Cast-in-situs steel reinforced concrete raceway water pressure testing method

[0045] An embodiment of the segmented hydraulic test of the cast-in-place reinforced concrete water delivery pipe of the present invention: the above-mentioned water delivery pipe is a segmented connection form, and the steps of the hydraulic test method are as follows:

[0046] Step 1 Refer to Figure 1-4 to construct reinforced concrete water pipe. The shape of reinforced concrete water pipe 1 can be square pipe with square hole, as shown in Figure 2; it can also be square pipe with round hole, as shown in Figure 3; or square pipe with polygonal shape. Hole shape, as shown in Figure 4; it can be a single hole or a double hole.

[0047] Step 2 Refer to Figures 5 and 6, to clean the inner wall of the reinforced concrete water pipe 1 and repair it smoothly. A waterstop 3 is arranged in the expansion joint 4 at the pipe joint, and a circle of notches 16 is reserved on the inner wall of the pipe head at the expansion joint.

[0048] Step 3 Refer to Figure 11. Apply adhesive layer 8 on both sides of the grooves opposite to the two pipe heads of the reinforced concrete water delivery pipe expansion joint. The adhesive layer is silicone structural adhesive, and the fluidity and plasticity of the silicone structural adhesive is used to fill the square tape. The gap between the pipe wall and the pipe wall ensures the sealing effect. Then glue the cover rubber tape 7 across the seam. The rubber tape is a circular square tape with a concave cross section. Its two sides are connected with trapezoidal sealing opposite sides. The outer diameter of the square tape is 4cm smaller than the inner diameter of the water pipe to adapt to the supporting process. The resulting deformation. Utilizing the elasticity of the tape, a sealed body is formed by the mechanical support of the adjustable screw rod. A sealed space is enclosed by expansion joints, water stop belts, inner tube wall recesses and rubber bands, and a sealing surface is formed between the inner wall of the tube and the rubber bands.

[0049] Step 4 Refer to Figures 7 and 8, press the two sides of the square tape 7 with the top pressure member 2 on the inner wall of the water pipe 1; the above-mentioned top pressure member 2 is composed of two arc-shaped top pressure channels 2.1 and the frame connected to it 2.2 Composition.

[0050]Step 5: Refer to Figures 9-13. The top pressure member is supported by the support frame in the water delivery pipe to ensure that its sealing surface is compressed and compacted. In the above step 5, the support frame includes two symmetrically supported on the back of the two top pressure members. The adjustable lead screw 5 and the Ф48 steel pipe 6 connected between the two. The supporting frame may also include a wooden square 9 laterally supported on the back of the top pressure member and a top bracket 10 that supports the wooden square. The specific process: erecting the operating platform and maintaining the railing; according to the position of the pressure test device, the square tape is placed, the channel steel is installed, the steel pipe support is installed, and the adjustable screw rod is installed. Then tighten the entire pressure test device so that the rubber belt presses the sealant on the pipe wall, and adjust the support bolts symmetrically to ensure that the sealing surface is compressed and compacted. The adjustable screw rod provides the reaction force to achieve the sealing effect. After the silicone structural adhesive reaches its strength (usually three days), use a 100×100mm wooden square and top support to support the back of the channel steel.

[0051] Step 6: Referring to FIG. 14, the exhaust and drain pipe 11 and the water inlet pipe 15 are connected inside and outside the above-mentioned sealed space.

[0052] Step 7: Refer to Figure 14. Start the test. Open the exhaust and drain valve 13 on the exhaust and drain pipe, and inject water into the sealed space from the water inlet pipe 15. After the air in the sealed space is removed, adjust the exhaust on the exhaust and drain pipe. The drain valve 14 controls the drain flow, while observing the pressure gauge 12 connected to the exhaust drain pipe until the pressure meets the requirements of the test standard.

[0053] Step 8: Check for leakage on the outer pipe wall of the water pipeline. If there is no leakage, the test is qualified.

[0054] Step 9: Remove the test device, test the next expansion joint, repeat the above steps 3-8.

[0055] Step 10: Through the hydraulic test of all expansion joints section by section, it is proved that the hydraulic test of the reinforced concrete water pipe meets the requirements, and the entire hydraulic test is completed.

[0056] Referring to Figures 11 and 14, the segmented assembling hydraulic test device of the above-mentioned cast-in-situ reinforced concrete water pressure test method is set in the expansion joint at the joint of the reinforced concrete water pipe, and it is characterized in that: A waterstop 3 is set in the expansion joint 4 of the water pipe 1, and a circle of notches 16 is reserved on the inner wall of the pipe head of the expansion joint. The two banks of the opposite grooves of the two pipe heads of the reinforced concrete water pipe expansion joint are coated with an adhesive layer 8. Then glue the cover rubber tape across the seam 7. A sealed space is enclosed by expansion joints, water stop tape, inner tube wall recess and rubber tape. A sealing surface is formed between the inner wall of the tube and the rubber tape. The component presses the two sides of the rubber band against the inner wall of the annular pipe; the pressing component is supported by the support frame in the water pipe, pressed and compacted. Inside and outside the above-mentioned sealed space, the exhaust and drain pipe 11 and the water inlet pipe 15 are connected. A pressure gauge 12 and an exhaust and drain valve 13 are connected to the gas drainage pipe, and a water inlet valve 14 is connected to the water inlet pipe.