Fabricated permeable dam and construction method

Abstract

The invention provides an assembly type permeable dam which comprises at least two prefabricated part units and a grouting pipe, the prefabricated part units are arranged in a row, each prefabricated part unit comprises a main body, a through permeable hole is formed in each main body, a clamping block is arranged on one of the two opposite faces of each main body, and a clamping groove is formed in the other face of each main body; a groove is formed in the clamping block, a first open groove communicating with the groove is formed in one of the two opposite faces of the main body, a second open groove communicating with the clamping groove is formed in the other face of the two opposite faces of the main body, and a plurality of grouting holes communicating with the grouting channel are formed in the grouting pipe in the axial direction of the grouting pipe at intervals. The embodiment of the invention further provides an assembly type permeable dam construction method based on the assembly type permeable dam. The technical problems that an existing permeable dam is low in construction efficiency and the safety of constructors cannot be guaranteed easily are solved, the technical effects of improving the construction efficiency of the permeable dam and reducing the construction difficulty and risk are achieved, and the constructed dam body is high in structural strength.

Description

Technical Field

[0001] The present invention relates to the technical field of waterway engineering, and particularly relates to a prefabricated permeable dam and a construction method of a prefabricated permeable dam based on the prefabricated permeable dam. Background Art

[0002] A permeable dam is a light guiding structure that allows part of the water flow to pass through the dam body. It has the functions of reducing the phreatic line of the dam body and improving the stability of the dam body. It can also appropriately guide the medium and low flow of water to concentrate towards the river channel, achieving the purpose of narrowing the medium and low water river width and promoting the scouring of the navigation channel, thereby improving the waterway conditions. At the same time, the design of the permeable dam that allows water and sand to pass through can effectively relieve the sedimentation in the upper reaches, make the water flow through the dam more uniform, reduce the scour under the dam, and provide a living space for aquatic organisms.

[0003] Most of the existing permeable dams are composed of natural materials such as gravel and pebbles piled up to form the dam body and the dam foundation. Some permeable dams are also equipped with plants that can purify water quality. Since traditional permeable dams need to pour materials for construction during construction, the required construction period is relatively long and the potential safety hazards during water construction are relatively large, resulting in low construction efficiency of the permeable dam and being not conducive to ensuring the safety of construction personnel. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a prefabricated permeable dam and a construction method of a prefabricated permeable dam based on the prefabricated permeable dam, which solves the problems of low construction efficiency of the permeable dam and being not conducive to ensuring the safety of construction personnel existing in the prior art.

[0005] According to an embodiment of the present invention, a prefabricated permeable dam includes prefabricated component units and grouting pipes. The number of the prefabricated component units is at least two and the prefabricated component units are arranged in a row. Each prefabricated component unit includes a main body and the main body is provided with penetrating permeable holes. One of the opposite two surfaces of the main body is provided with a clamping block, and the other surface is provided with a clamping groove. The clamping block is provided with a groove, and one of the opposite two surfaces of the main body is provided with a first slot communicating with the groove, and the other surface is provided with a second slot communicating with the clamping groove. In any two adjacent prefabricated component units, the clamping block on one of the prefabricated component units cooperates with the clamping groove on the other prefabricated component unit, and the groove and the clamping groove communicate to form a chamber, and the first slot and the second slot communicate to form a grouting channel communicating with the chamber. The grouting pipe is inserted into the grouting channel and there is a gap between the grouting pipe and the inner wall of the grouting channel. A plurality of grouting holes respectively communicating with the grouting channel are arranged at intervals along the axial direction of the grouting pipe on the grouting pipe.

[0006] On the other hand, according to an embodiment of the present invention, a construction method of a prefabricated permeable dam is further provided. Based on the above prefabricated permeable dam, it includes the following steps:

[0007] S1. Fabricate precast member units and grouting pipes;

[0008] S2. Lay a riprap bed on the riverbed, set bed stones on the riprap bed, compact and level the riprap bed according to the height of the bed stones, then lay a gravel cushion layer on the riprap bed and level and trim the gravel cushion layer;

[0009] S3. Hoist the precast member units onto the gravel cushion layer in sequence and splice them into a row. In two adjacent precast member units, the clamping blocks on one precast member unit are inserted into the clamping grooves on the other precast member unit;

[0010] S4. Set shoulder stones on the water-facing side and the back water-facing side of the precast member units respectively. The shoulder stones are respectively abutted against both sides of the precast member units and cover the gravel cushion layer;

[0011] S5. Insert the grouting pipes into the grouting channels respectively, and inject a gelling material into the grouting pipes to make the gelling material fill the chamber and the grouting channels. Wait for the gelling material to completely solidify and carry out curing during the solidification process of the gelling material.

[0012] Compared with the prior art, the present invention has the following beneficial effects: By using a plurality of precast member units spliced into a row to form the dam body of the permeable dam, the water-permeable holes on the main body of the precast member unit are used for the dam body to pass water, and when adjacent precast member units are spliced, they are combined through the cooperation of the clamping blocks and the clamping grooves, which is convenient to splice a plurality of precast member units into one body and improve the construction efficiency. After two adjacent precast member units are spliced, the groove on one precast member unit communicates with the clamping groove on the other precast member unit to form a chamber, and at the same time, the first slot on one precast member unit communicates with the second slot on the other precast member unit to form a grouting channel communicating with the chamber. At this time, the grouting pipe can be inserted into the grouting channel and the gelling material is injected into the grouting pipe, so that the gelling material is injected into the chamber along the grouting pipe and the grouting channel. After the gelling material fills the chamber, it continues to fill the grouting channel and the grouting pipe and overflows from the grouting holes on the grouting pipe to fill the gap between the grouting pipe and the grouting channel, so as to form an adhesive layer between two adjacent precast member units through the gelling material to bond the main bodies of two adjacent precast member units and the grouting pipe between the two main bodies into one body, improving the structural strength of the dam body. It solves the technical problems of low construction efficiency of the existing permeable dam and being unfavorable for ensuring the safety of construction personnel, and produces the technical effects of improving the construction efficiency of the permeable dam, reducing the construction difficulty and risk, and the built dam body has high structural strength, ensuring the stability and reliability of the permeable dam. Description of the Drawings

[0013] Figure 1 It is a structural schematic diagram of an assembled permeable dam according to an embodiment of the present invention;

[0014] Figure 2 Cross-sectional view of the prefabricated permeable dam according to an embodiment of the present invention;

[0015] Figure 3 Schematic structural diagram of the precast member unit in the prefabricated permeable dam according to an embodiment of the present invention;

[0016] Figure 4 Schematic structural diagram of the precast member unit in the prefabricated permeable dam according to an embodiment of the present invention from another perspective;

[0017] Figure 5 Schematic structural diagram of the grouting pipe in the prefabricated permeable dam according to an embodiment of the present invention;

[0018] Figure 6 Cross-sectional view of another section of the prefabricated permeable dam according to an embodiment of the present invention;

[0019] Figure 7 Schematic structural diagram of the first end cap in the prefabricated permeable dam according to an embodiment of the present invention;

[0020] Figure 8 Schematic structural diagram of the second end cap in the prefabricated permeable dam according to an embodiment of the present invention;

[0021] Figure 9 Schematic structural diagram of the prefabricated permeable dam after installation according to an embodiment of the present invention.

[0022] In the above-mentioned drawings: 1, riprap bed; 2, bedrock boulders; 3, gravel cushion layer; 4, shoulder boulders; 5, riverbed; 100, precast member unit; 101, main body; 102, permeable holes; 103, clamping blocks; 104, clamping grooves; 105, grooves; 106, first slotted opening; 107, second slotted opening; 108, chamber; 109, grouting channel; 110, convex blocks; 111, limiting grooves; 112, first rib; 113, second rib; 200, grouting pipe; 201, grouting holes; 202, collar; 203, elastic support arms; 204, connector; 205, first threaded hole; 300, adapter pipe; 301, first threaded portion; 302, second threaded portion; 400, material guiding funnel; 401, second threaded hole; 500, first end cap; 600, second end cap. Detailed implementation manners

[0023] The technical solutions in the present invention will be further described below in conjunction with the drawings and embodiments.

[0024] As Figures 1 to 6As shown in the figure, an embodiment of the present invention provides a prefabricated permeable dam, which includes a prefabricated component unit 100 made of concrete pouring, and also includes a grouting pipe 200. The number of the prefabricated component units 100 is at least two and the prefabricated component units 100 are arranged in a row. The prefabricated component unit 100 includes a main body 101 and a through permeable hole 102 is provided on the main body 101. A clamping block 103 is provided on one of the opposite two sides of the main body 101, and a clamping groove 104 is provided on the other side. A groove 105 is provided on the clamping block 103, and a first slot 106 communicating with the groove 105 is provided on one of the opposite two sides of the main body 101, and a second slot 107 communicating with the clamping groove 104 is provided on the other side. The clamping block 103 on one of any adjacent two prefabricated component units 100 cooperates with the clamping groove 104 on the other prefabricated component unit 100 to combine the two prefabricated component units 100. After the two prefabricated component units 100 are combined, the groove 105 on one of the prefabricated component units 100 communicates with the clamping groove 104 on the other prefabricated component unit 100 and encloses a chamber 108. At the same time, the first slot 106 on one of the prefabricated component units 100 communicates with the second slot 107 on the other prefabricated component unit 100 and encloses a grouting channel 109 communicating with the chamber 108. The grouting pipe 200 is inserted into the grouting channel 109 and there is a gap between the grouting pipe 200 and the inner wall of the grouting channel 109. A plurality of grouting holes 201 communicating with the grouting channel 109 are arranged at intervals along the axial direction of the grouting pipe 200 on the grouting pipe 200. The grouting pipe 200 is used to guide the gelling material into the chamber 108 and the grouting channel 109, and the gelling material overflowing from the grouting holes 201 will fill the gap between the grouting pipe 200 and the grouting channel 109, so as to form an adhesive layer through the gelling material to bond and fix the adjacent two main bodies 101 and the grouting pipe 200 between the two main bodies 101.

[0025] Specifically, the assembled permeable dam provided in this embodiment forms a dam body by sequentially splicing a plurality of the precast member units 100 in a row. The permeable holes 102 on the main body 101 of the precast member unit 100 are used for the dam body to pass through water and sand, enabling the dam body to permeate water and sand, thereby effectively alleviating the sedimentation upstream and providing a living space for aquatic organisms. When adjacent precast member units 100 are spliced, they are combined through the cooperation of the clamping block 103 and the clamping groove 104, which facilitates splicing a plurality of the precast member units 100 into one body. While the installation is convenient, the dam body can be assembled quickly, which is conducive to improving the construction efficiency. In this embodiment, after two adjacent precast member units 100 are spliced, a chamber 108 is formed by the groove 105 on one of the precast member units 100 and the clamping groove 104 on the other precast member unit 100. At the same time, a grouting channel 109 communicating with the chamber 108 is formed by the first slot 106 on one of the precast member units 100 and the second slot 107 on the other precast member unit 100. After inserting the grouting pipe 200 into the grouting channel 109, a gelling material is injected into the grouting pipe 200. The gelling material is selected as mortar. The gelling material is injected into the chamber 108 along the grouting pipe 200 and the grouting channel 109, fills the chamber 108, and fills the grouting channel 109 and the grouting pipe 200. The gelling material overflowing from the grouting hole 201 fills the gap between the grouting pipe 200 and the grouting channel 109. The bonding layer formed by the gelling material can bond two adjacent main bodies 101 and the grouting pipe 200 between the two main bodies 101 into one body, thereby enhancing the structural strength of the dam body of the assembled permeable dam. The assembled permeable dam provided in this embodiment has a high construction efficiency, low construction difficulty, is conducive to reducing construction risks, and the built dam body has high structural strength and good stability.

[0026] As Figure 3 and Figure 4 shown, one end of the clamping block 103 is provided with a convex block 110, and one end of the clamping groove 104 is provided with a limiting groove 111 that cooperates with the convex block 110. During the combination process of the two precast member units 100, the clamping block 103 on one of the precast member units 100 is inserted into the clamping groove 104 on the other precast member unit 100 and moves until the convex block 110 is inserted into the limiting groove 111. Through the cooperation of the convex block 110 and the limiting groove 111, the two adjacent precast member units 100 are positioned. After the convex block 110 is inserted into the limiting groove 111, the groove 105 is aligned with the corresponding clamping groove 104, and the first slot 106 is aligned with the corresponding second slot 107, ensuring that the cooperation between two adjacent precast member units 100 is tight when the assembled permeable dam is assembled.

[0027] Please refer to Figure 3 , Figure 4 and Figure 6 . A plurality of first ribs 112 are provided in the groove 105, and the first ribs 112 are arranged at intervals along the length direction of the groove 105. The first ribs 112 provided in the groove 105 can increase the contact area of the bonding layer formed between the main body 101 and the gelling material, ensure the firm bonding between the main body 101 and the bonding layer, and facilitate further improving the reliability of the connection between the bonding layer and the main body 101.

[0028] Specifically, a plurality of second ribs 113 are provided in the card slot 104. The second ribs 113 are arranged at intervals along the length direction of the card slot 104 and the first ribs 112 and the second ribs 113 are arranged in a staggered manner. The second ribs 113 provided in the slot are in contact with the bonding layer formed by the gelling material injected into the chamber 108, which can increase the contact area between the main body 101 and the bonding layer and make the connection between the main body 101 and the bonding layer tight. At the same time, the first ribs 112 and the second ribs 113 are arranged in a staggered manner, so that the gelling material injected into the chamber 108 can be evenly distributed between the two main bodies 101, and the connection between the two main bodies 101 is kept stable under the action of the bonding layer.

[0029] Please refer to Figure 2 and Figure 5 . A collar 202 is sleeved on the outer peripheral wall of the grouting pipe 200. A plurality of elastic support arms 203 are arranged at intervals along the circumferential direction of the collar 202, and the elastic support arms 203 are respectively abutted against the inner wall of the grouting channel 109. By sleeving the collar 202 on the outer peripheral wall of the grouting pipe 200 and arranging a plurality of the elastic support arms 203 at intervals on the collar 202, after the grouting pipe 200 is inserted into the grouting channel 109, the grouting pipe 200 is supported by the elastic support arms 203 abutting against the inner wall of the grouting channel 109, ensuring the stable position of the grouting pipe 200 in the grouting channel 109 and keeping the grouting pipe 200 at the central position of the grouting channel 109. Furthermore, the gelling material overflowing from the grouting hole 201 can evenly wrap the grouting pipe 200 and fill the space between the grouting pipe 200 and the grouting channel 109, making the bonding layer formed in the grouting channel 109 firmly bonded to the adjacent two main bodies 101.

[0030] In this embodiment, one end of the grouting pipe 200 is provided with a connector 204, and the connector 204 covers the opening of the grouting channel 109. The connector 204 provided at the end of the grouting pipe 200 is used to seal the opening of the grouting channel 109, preventing the leakage of the gelling material from the opening of the grouting channel 109 when injecting the gelling material into the grouting pipe 200. At the same time, when the grouting pipe 200 is inserted into the grouting channel 109, moving the connector 204 to a position where it abuts against the main body 101 can ensure that the end of the grouting pipe 200 extends into the grouting channel 109 to a predetermined depth, ensuring that the gelling material is quickly injected into the chamber 108 under the guidance of the grouting pipe 200.

[0031] Please refer to Figure 1 、 Figure 2 and Figure 5 A detachable adapter pipe 300 is provided on the connector 204. The adapter pipe 300 extends away from the grouting channel 109, and a detachable feeding funnel 400 is provided at the end of the adapter pipe 300 away from the connector 204. By installing the bent adapter pipe 300 on the connector 204 for the installation of the feeding funnel 400, the feeding funnel 400 is used to guide the gelling material into the grouting pipe 200, facilitating the quick injection of the gelling material into the grouting pipe 200, which is beneficial to further improving the assembly efficiency of the dam body of the assembled permeable dam. After the gelling material is filled, the feeding funnel 400 and the adapter pipe 300 can be removed in sequence and reused, thus saving material costs.

[0032] Specifically, the two opposite ends of the adapter pipe 300 are respectively provided with a first thread portion 301 and a second thread portion 302. A first threaded hole 205 matching the first thread portion 301 is provided on the connector 204, and a second threaded hole 401 matching the second thread portion 302 is provided on the feeding funnel 400. The adapter pipe 300 is installed on the connector 204 through the cooperation of the first thread portion 301 and the first threaded hole 205, so that the adapter pipe 300 can be connected to the grouting pipe 200. Then, the feeding funnel 400 is installed on the adapter pipe 300 through the cooperation of the second thread portion 302 and the second threaded hole 401. Pouring the gelling material into the feeding funnel 400 can quickly inject the gelling material into the grouting pipe 200, with simple operation and convenient disassembly and assembly.

[0033] Such as Figure 1 、 Figure 7 and Figure 8As shown in the figure, the prefabricated permeable dam further includes a first end cover 500 and a second end cover 600. The first end cover 500 is provided with the clamping block 103 and the first slot 106, and the second end cover 600 is provided with the clamping groove 104 and the second slot 107. The first end cover 500 and the second end cover 600 are respectively used for being installed at both ends of the dam body. The clamping block 103 on the first end cover 500 cooperates with the clamping groove 104 on the prefabricated component unit 100 at one end of the dam body, and the clamping groove 104 on the second end cover 600 cooperates with the clamping block 103 on the prefabricated component unit 100 at the other end of the dam body. The first slot 106 provided on the first end cover 500 and the second slot 107 provided on the second end cover 600 respectively enclose the grouting channel 109 with the corresponding prefabricated component unit 100. By bonding the first end cover 500 and the second end cover 600 to the corresponding prefabricated component unit 100 respectively, both ends of the dam body can be covered, making the prefabricated permeable dam beautiful and avoiding damage to the clamping groove 104, the clamping block 103, etc. exposed at both ends of the dam body, which may affect the stability of the dam body structure.

[0034] On the other hand, as Figure 9 shown, the embodiment of the present invention further provides a construction method for a prefabricated permeable dam. Based on the above-mentioned prefabricated permeable dam, the method includes the following steps:

[0035] S1. Fabricate the prefabricated component unit 100 and the grouting pipe 200.

[0036] In step S1, the prefabricated component unit 100 is formed by concrete pouring. After the prefabricated component unit 100 is formed, its main body 101 is generally trapezoidal and two permeable holes 102 facing different directions are formed on the main body 101. By opening the two permeable holes 102, the permeability rate of the prefabricated component unit 100 reaches more than 40%, ensuring that water flow, silt, sand and gravel, aquatic organisms, etc. can smoothly pass through the main body 101 after the prefabricated frame unit is set on the river channel; the grouting pipe 200 can be made of metal or plastic.

[0037] S2. Lay a riprap bed 1 on the riverbed 5, set bedrock boulders 2 on the riprap bed 1, compact and level the riprap bed 1 according to the height of the bedrock boulders 2, and then lay a gravel cushion layer 3 on the riprap bed 1 and level and level the gravel cushion layer 3.

[0038] In step S2, a positioning barge is used for positioning. The stone-dropping barge positions on the riverbed 5 according to the positioning barge and lays a rubble bed 1. During the laying process of the rubble bed 1, a layer of stones is first laid, and bed stones 2 are set on this layer of stones and then the laying continues. After the laying of the rubble bed 1 is completed, a leveling barge is used to tamp and level the rubble bed 1. After the rubble bed 1 is leveled, the top surface of the bed stones 2 is flush with the top surface of the rubble bed 1. The bed stones 2 are used to support the precast component units 100 to be installed later; after the rubble bed 1 is leveled, a crushed stone cushion layer 3 is laid, and the crushed stone cushion layer 3 is leveled and leveled to ensure that the subsequent precast component units 100 are installed on a horizontal plane.

[0039] S3. The precast component units 100 are successively hoisted onto the crushed stone cushion layer 3 and spliced into a row in sequence. In two adjacent precast component units 100, the clamping blocks 103 on one precast frame unit are inserted into the clamping grooves 104 on the other precast component unit 100.

[0040] In step S3, when installing the precast component units 100, a barge is equipped to transport the precast frame units, and a crane ship is used to hoist the precast frame units from the barge and carry the precast frame units to the crushed stone cushion layer 3. After the precast component units 100 are carried to the crushed stone cushion layer 3 in sequence, they are spliced in sequence. During the placement process of the precast component units 100, a total station is used to position the axis of the precast component units 100 to ensure that the precast unit components are arranged in a straight line after splicing.

[0041] After step S3, it also includes step S31. The first end cover 500 and the second end cover 600 are respectively hoisted onto the crushed stone cushion layer 3, and the first end cover 500 and the second end cover 600 are respectively spliced with the precast component units 100 at both ends.

[0042] S4. Shoulder stones 4 are respectively arranged on the water-facing side and the back water-facing side of the precast component units 100. The shoulder stones 4 respectively abut against both sides of the precast component units 100 and cover the crushed stone cushion layer 3.

[0043] In step S4, after the precast component units 100 are assembled on the rubble bed 1, shoulder stones 4 are respectively arranged on both sides of the precast component units 100. By abutting against both sides of the precast component units 100 with the shoulder stones 4, the precast component units 100 can be kept stable on the rubble bed 1, and the shoulders on both sides of the rubble bed 1 are covered by the shoulder stones 4 to protect the rubble bed 1.

[0044] S5. The grouting pipes 200 are respectively inserted into the grouting channels 109, and a gelling material is injected into the grouting pipes 200 to make the gelling material fill the chamber 108 and the grouting channels 109. Wait for the gelling material to completely solidify and carry out maintenance during the solidification process of the gelling material.

[0045] In step S5, first insert the grouting pipes 200 into the respective grouting channels 109. Before injecting the gelling material, sequentially connect the adapter pipe 300 and the material guiding funnel 400 to the connector 204 of the grouting pipe 200. Pour the gelling material into the material guiding funnel 400 so that the gelling material enters the chamber 108 and the grouting channels 109 along the adapter pipe 300 and the grouting pipe 200 until the chamber 108 and the grouting channels 109 are filled with the gelling material. After the gelling material is filled, remove the adapter pipe 300 and the material guiding funnel 400 and wait for the gelling material to completely solidify. During the solidification process of the gelling material, curing is required until the gelling material forms an adhesive layer to bond the prefabricated component units 100 together, and thus the construction of the assembled permeable dam can be completed.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An assembled permeable dam, characterized in that: It comprises a prefabricated component unit and a grouting pipe, wherein the number of the prefabricated component units is at least two and the prefabricated component units are arranged in a row, the prefabricated component unit comprises a main body and the main body is provided with a penetrating water-permeable hole, one of the two opposite sides of the main body is provided with a block and the other side is provided with a slot, the block is provided with a groove, and one of the two opposite sides of the main body is provided with a first slot connected to the groove and the other side is provided with a second slot connected to the slot, the block on one of the prefabricated component units of any two adjacent prefabricated component units cooperates with the slot on the other prefabricated component unit and the groove is connected to the slot and forms a chamber, the first slot is connected to the second slot and forms a grouting channel connected to the chamber, the grouting pipe is inserted into the grouting channel and there is a gap between the grouting pipe and the inner wall of the grouting channel, and a plurality of grouting holes respectively connected to the grouting channel are provided on the grouting pipe along the axial direction of the grouting pipe.

2. The assembled permeable dam according to claim 1, characterized in that: A protrusion is provided at one end of the clamping block, and a limiting groove matched with the protrusion is provided at one end of the clamping slot.

3. The assembled permeable dam according to claim 1, characterized in that: A plurality of first convex ribs are arranged in the groove, and the first convex ribs are arranged at intervals along the length direction of the groove.

4. The assembled permeable dam according to claim 3, characterized in that: A plurality of second convex ribs are arranged in the slot, the second convex ribs are arranged at intervals along the length direction of the slot, and the first convex ribs and the second convex ribs are arranged alternately.

5. The assembled permeable dam according to claim 1, characterized in that: A collar is sleeved on the outer peripheral wall of the grouting pipe, and a plurality of elastic support arms are spaced apart on the collar along the circumference of the grouting pipe, and the elastic support arms are respectively in contact with the inner wall of the grouting channel.

6. The assembled permeable dam according to claim 1, characterized in that: A connector is provided at one end of the grouting pipe, and the connector covers the opening of the grouting channel.

7. The assembled permeable dam according to claim 6, characterized in that: The connecting head is provided with a detachable transfer tube, the transfer tube extends in a direction away from the grouting channel, and a detachable material guiding funnel is provided at one end of the transfer tube away from the connecting head.

8. The assembled permeable dam according to claim 7, characterized in that: The two opposite ends of the transfer tube are respectively provided with a first threaded portion and a second threaded portion, the connecting head is provided with a first threaded hole matched with the first threaded portion, and the material guiding funnel is provided with a second threaded hole matched with the second threaded portion.

9. The assembled permeable dam according to claim 1, characterized in that: It also includes a first end cover and a second end cover, the first end cover is provided with the clamping block and the first slot, and the second end cover is provided with the clamping slot and the second slot.

10. A method for constructing an assembled permeable dam, characterized in that: The assembled permeable dam according to any one of claims 1 to 9 comprises the following steps: S1. Manufacturing prefabricated component units and grouting pipes; S2. Laying a riprap base on the riverbed, and setting base stones on the riprap base, compacting and leveling the riprap base according to the height of the base stones, and then laying a crushed stone cushion layer on the riprap base, and leveling and screeding the crushed stone cushion layer; S3, hoisting the prefabricated component units onto the gravel cushion layer in sequence and splicing them into a row in order, inserting the card block on one prefabricated frame unit of two adjacent prefabricated component units into the card slot on the other prefabricated component unit; S4. A shoulder block is respectively arranged on the water-facing surface and the water-receiving surface of the prefabricated component unit, and the shoulder block is respectively abutted against both sides of the prefabricated component unit and covered on the gravel cushion layer; S5. Insert the grouting pipes into the grouting channels respectively, and inject the cementitious material into the grouting pipes so that the cementitious material fills the cavity and the grouting channel, wait for the cementitious material to completely solidify, and perform curing during the solidification process of the cementitious material.

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