Installation device and sealing method of rubber airbag for high water level iron pipe dewatering well in deep foundation pit

Abstract

The present invention discloses a rubber airbag installation device for a high-water-level iron pipe dewatering well in a deep foundation pit, comprising a base plate, an outer tube installed on the base plate, a clamping claw assembly connected to the base plate and arranged to clamp and release the rubber airbag, and an air guide tube assembly penetrating the outer tube and used in conjunction with the rubber airbag; the air guide tube assembly is used to inflate the rubber airbag so that the rubber airbag expands and is stuck in the iron pipe dewatering well. The installation device of the present technical solution clamps the rubber airbag and releases it to a specified position through the clamping claw assembly, inflates the rubber airbag through the air guide tube assembly, and after the inflation is completed, the rubber airbag is tightened in the water well. The overall process is convenient and reliable to operate. The sealing method of the present technical solution ensures the sealing quality of the high-water-level iron pipe dewatering well in the deep foundation pit, meets the engineering quality requirements, avoids uncontrollable water leakage after the raft slab of the dewatering well is cast in the later stage, and improves the construction quality.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to a rubber airbag installation device and a blocking method for a high-water-level iron pipe dewatering well in a deep foundation pit. Background Art

[0002] During building construction, before deep foundation pit excavation, dewatering wells are typically set up on the ground to lower the groundwater level. Water is then continuously pumped out of the dewatering wells through pumping pipes. Once the groundwater level drops to the designed elevation, the foundation pit is excavated. After construction is complete, the deep foundation pit dewatering wells typically need to be sealed. Sealing the deep foundation pit dewatering wells is a critical step in subsequent foundation construction, directly impacting the effectiveness of the waterproofing project.

[0003] The existing method of sealing high-water-level dewatering wells in deep foundation pits is in-well grouting, which involves directly injecting grout into the well. However, when faced with complex geological conditions such as high water levels and severe pipe gushing, the direct grouting method has limited water-stopping effects, and traditional construction methods cannot meet the quality requirements of well sealing.

[0004] Therefore, in order to solve the above problems, a rubber airbag installation device and a sealing method for a high-water-level iron pipe dewatering well in a deep foundation pit are needed. Summary of the Invention

[0005] In view of this, the installation device of the present technical solution clamps the rubber airbag through the clamping claw assembly and releases it to the specified position, inflates the rubber airbag through the air guide tube assembly, and after the inflation is completed, the rubber airbag is tightened in the water well. The overall process is convenient and reliable to operate. The sealing method of the present technical solution ensures the sealing quality of the high-water-level iron pipe dewatering well in the deep foundation pit, meets the engineering quality requirements, avoids uncontrollable leakage after the raft slab is cast in the dewatering well in the later stage, and improves the construction quality.

[0006] A rubber airbag installation device for a high-water-level iron pipe dewatering well in a deep foundation pit comprises a base plate, an outer tube mounted on the base plate, a clamping claw assembly connected to the base plate for clamping and releasing the rubber airbag, and an air guide tube assembly penetrating the outer tube and used in conjunction with the rubber airbag; the air guide tube assembly is used to inflate the rubber airbag so that the rubber airbag expands and is stuck in the iron pipe dewatering well.

[0007] Furthermore, the clamping jaw assembly includes a support arm installed at the bottom of the base plate, a clamping arm hingedly installed with the support arm, and a tension spring connected and installed between the support arm and the clamping arm, and the clamping arm is used to clamp the rubber airbag.

[0008] Furthermore, a plurality of support arms are provided along the circumferential direction of the substrate, and a plurality of clamping arms are provided and are installed in correspondence with the plurality of support arms.

[0009] Furthermore, a rubber sheet for use with the rubber airbag is installed at the end of the clamping arm.

[0010] Furthermore, the air guide tube assembly includes an inner tube coaxially installed with the outer tube, a limiting ring arranged in the circumferential direction of the inner tube, and an air needle installed at the end of the inner tube. The base plate is provided with a mounting hole for installing the inner tube, and the inner tube can slide along the axial direction of the outer tube for telescopic adjustment.

[0011] Furthermore, it also includes a support plate, the support plate and the base plate are arranged parallel to each other, and the multiple support arms are evenly distributed in the circumferential direction of the support plate.

[0012] Furthermore, a guide seat for cooperating with the inner tube is provided on the support plate.

[0013] Further, the method includes using the above-mentioned deep foundation pit high water level iron pipe dewatering well rubber airbag installation device for construction;

[0014] The following steps are also included:

[0015] S1: Chisel the wellhead in the circumferential direction at an angle of a° to the axial direction of the well, with a chiseling depth of 12-18 cm and an angle of 40-50°;

[0016] S2: Two positioning holes are machined at the same height 7-10 cm below the wellhead of the iron pipe well. After machining, the rubber airbag is clamped by a rubber airbag installation device and released downward into the iron pipe dewatering well;

[0017] S3: After the rubber airbag is released downward to the designated position, air is inflated into the rubber airbag to make it expand and tighten against the inner wall of the iron pipe well. After the rubber airbag is installed, observe whether the iron pipe well is tightly sealed.

[0018] S4: Drain the water above the rubber airbag in the iron pipe well, and then use high-strength grouting material to grout the well space above the rubber airbag;

[0019] S5: Install the plugging steel plate to the grouting area of ​​the high-strength grouting material, and weld the plugging steel plate to the inner wall of the iron pipe well by welding;

[0020] S6: Install the casting template at the location where the iron pipe well mouth is chiseled out, install the locking parts at the positioning holes and connect and install them in conjunction with the casting template. After the template and the locking parts are installed, seal and cast the template inside and outside the well mouth.

[0021] Furthermore, a lifting rod is installed on the blocking steel plate.

[0022] The beneficial effects of the present invention are: the installation device of the present technical solution clamps the rubber airbag through the clamping claw assembly and releases it to the specified position, inflates the rubber airbag through the air guide tube assembly, and after the inflation is completed, the rubber airbag is tightened in the water well. The overall process is convenient and reliable to operate. The sealing method of the present technical solution ensures the sealing quality of the high-water-level iron pipe dewatering well in the deep foundation pit, meets the engineering quality requirements, avoids uncontrollable leakage after the raft slab is cast in the dewatering well in the later stage, and improves the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0024] Figure 1 It is an overall schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the installation device of the present invention;

[0026] Figure 3 This is a schematic diagram of the sealing steel plate structure of the present invention. DETAILED DESCRIPTION

[0027] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the installation device of the present invention; Figure 3 This is a schematic diagram of the sealing steel plate structure of the present invention; as shown in the figure, a rubber airbag installation device for a high-water-level iron pipe dewatering well in a deep foundation pit comprises a base plate 14, an outer tube 11 installed on the base plate 14, a clamping claw assembly connected to the base plate 14 for clamping and releasing the rubber airbag, and an air guide tube assembly penetrating the outer tube and used in conjunction with the rubber airbag; the air guide tube assembly is used to inflate the rubber airbag 2 so that the rubber airbag expands and is stuck in the iron pipe dewatering well; the installation device of this technical solution clamps the rubber airbag and releases it to a specified position through the clamping claw assembly, inflates the rubber airbag 2 through the air guide tube assembly, and after the inflation is completed, the rubber airbag 2 is tightened in the water well. The overall process is convenient and reliable to operate. The sealing method of this technical solution ensures the sealing quality of the high-water-level iron pipe dewatering well in the deep foundation pit, meets the engineering quality requirements, avoids uncontrollable leakage after the raft slab of the dewatering well is cast in the later stage, and improves the construction quality.

[0028] In this embodiment, the clamping jaw assembly includes a support arm 18 mounted on the bottom of the base plate 14, a clamping arm 20 hingedly mounted to the support arm 18, and a tension spring 19 connected between the support arm and the clamping arm 20. The clamping arm 20 is used to clamp the rubber airbag. The support arm 18 is fixedly mounted on the bottom circumference of the base plate 14. The support arm 18 and the clamping arm 20 are hingedly connected, with a tension spring 19 disposed between them to facilitate the return of the clamping arm after completion of its operation.

[0029] In this embodiment, multiple support arms 18 are provided along the circumference of substrate 14, and multiple clamping arms are provided and mounted in correspondence with the multiple support arms. The support arms 18 are paired with the clamping arms 20 and tension springs 19 to form a set. Multiple sets are provided along the circumference of the substrate to facilitate clamping the rubber airbag 2 and prevent instability.

[0030] In this embodiment, a rubber sheet 21 for use with the rubber airbag is installed at the end of the clamping arm 20, and a rubber sheet that can enhance friction is provided at the lower end of the clamping arm 20 to facilitate clamping and lowering the rubber airbag 2.

[0031] In this embodiment, the air guide tube assembly includes an inner tube 12 coaxially mounted with an outer tube 11, a retaining ring 16 circumferentially disposed on the inner tube, and an air needle mounted at the end of the inner tube. The base plate 14 is provided with mounting holes for the inner tube. The inner tube can slide axially along the outer tube for telescopic adjustment. The inner tube 12 can slide axially along the outer tube 11 and is secured by a retaining block 13 disposed within the outer tube. An air needle is disposed at the lower end of the inner tube 12 to facilitate inflation of the rubber airbag. The retaining ring 16 provides axial restraint during sliding adjustment of the inner tube.

[0032] This embodiment further includes a support plate 15, which is arranged parallel to the base plate 14, and a plurality of support arms 18 are evenly distributed around the support plate. The support plate 15 is arranged parallel to the base plate 14 to improve the stability and strength of the overall structure.

[0033] In this embodiment, a guide seat 17 for cooperating with the inner tube 12 is provided on the support plate 15. The guide seat 17 is used to guide and limit the inner tube 12 to ensure that the inner tube does not deviate from the preset running track when sliding.

[0034] In this embodiment, the construction includes using the above-mentioned deep foundation pit high water level iron pipe dewatering well rubber airbag installation device;

[0035] The following steps are also included:

[0036] S1: The circumferential direction of the wellhead of the iron pipe well is chiseled at an angle of a° with the axial direction of the iron pipe well, the chiseling depth is 12-18 cm, and a° is 40-50°; during construction, the wellhead is chiseled first, and the chiseling depth is preferably 15 cm downward from the wellhead, and a° can preferably be 45°.

[0037] S2: Two positioning holes are machined at the same height 7-10 cm below the wellhead of the iron pipe well. After the machining is completed, the rubber airbag installation device is used to clamp the rubber airbag and release it downward into the iron pipe dewatering well; positioning holes are machined at a certain position below the wellhead of the iron pipe well. The two positioning holes are at the same height and pass through the center of the same iron pipe well cross section. After the machining is completed, the rubber airbag is clamped and lowered into the iron pipe well using the above-mentioned installation device.

[0038] S3: After the rubber airbag 2 is released downward to the designated position, air is inflated into the rubber airbag to expand it and tighten it against the inner wall of the iron pipe well. After the rubber airbag is installed, observe whether the iron pipe well is tightly sealed. Generally, after the rubber airbag 2 is lowered to the designated position in the wellhead, air is inflated into the rubber airbag through the inner tube. After the air is inflated and expanded until it tightens against the inner wall of the iron pipe well, the inner tube is pulled upward to separate the air needle from the rubber airbag, and then the rubber airbag installation device is pulled upward.

[0039] S4: drain the water above the rubber airbag in the iron pipe well, and then use high-strength grouting material to grout the well space above the rubber airbag; after the rubber airbag is installed, pump out the water above the airbag, stir the high-strength grouting material, and fill the stirred high-strength grouting material into the iron pipe dewatering well to an appropriate height to form the airbag upper layer grouting 3.

[0040] S5: Install the blocking steel plate 4, install the blocking steel plate to the grouting place of the high-strength grouting material, and weld the blocking steel plate and the inner wall of the iron pipe well by welding; install the blocking steel plate to the upper surface of the grouting place and weld it to the inner wall of the iron pipe well 9. When welding, the blocking steel plate needs to be positioned and spot welded. After completing the spot welding, two full weldings are performed in sequence. When performing the first full welding, the b° chamfer (generally 45°) of the blocking steel plate should be filled to make it firm, and then repeat the above operation to perform the second full welding. The welding quality needs to be controlled during welding. Sand holes, leaks, etc. are not allowed. If the welding is found to be unqualified, the sand holes or leaks need to be overlapped and repaired.

[0041] S6: Install the casting template at the location where the chiseling construction is completed at the wellhead of the iron pipe well, install the locking parts at the positioning holes and connect and install them in conjunction with the casting template. After the template and locking parts are installed, seal and cast the template inside and outside the wellhead. Install the casting template at the location where the chiseling construction is completed, and at the same time, pass the locking parts through the two positioning holes and install them in conjunction with the casting template (here, tension bolts 8 can be used). After completion, cast the inside and outside circumference of the wellhead to form an inner cast layer 5 and an outer cast layer 7. The tension bolts 8 play a role in connecting the inner and outer layers, making the upper cast structure more powerful. The raft top 6 is located above the inner cast layer 5.

[0042] In this embodiment, a lifting rod 41 is installed on the blocking steel plate. The lifting rod 41 is convenient for construction when welding.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A rubber airbag installation device for a high-water-level iron pipe dewatering well in a deep foundation pit, characterized by: The invention comprises a base plate, an outer tube mounted on the base plate, a clamping claw assembly connected to the base plate for clamping and releasing the rubber airbag, and an air guide tube assembly penetrating the outer tube and used in conjunction with the rubber airbag; the air guide tube assembly is used to inflate the rubber airbag so that the rubber airbag expands and is stuck in the iron pipe drainage well; the clamping claw assembly comprises a support arm mounted on the bottom of the base plate, a clamping arm hingedly mounted with the support arm, and a tension spring connected and mounted between the support arm and the clamping arm, the clamping arm is used to clamp the rubber airbag; the support Multiple arms are provided along the circumferential direction of the base plate, and multiple clamping arms are provided and are installed in correspondence with the multiple support arms; a rubber sheet for cooperating with the rubber airbag is installed at the end of the clamping arm; the air guide tube assembly includes an inner tube coaxially installed with the outer tube, a limiting ring arranged in the circumferential direction of the inner tube, and an air needle installed at the end of the inner tube; a mounting hole for installing the inner tube is provided on the base plate, and the inner tube can slide along the axial direction of the outer tube for telescopic adjustment; it also includes a support plate, and the support plate and the base plate are arranged parallel to each other.

2. The rubber airbag installation device for a high-water-level iron pipe dewatering well in a deep foundation pit according to claim 1 is characterized by: The plurality of support arms are evenly distributed in the circumferential direction of the support plate.

3. The rubber airbag installation device for a high-water-level iron pipe dewatering well in a deep foundation pit according to claim 2 is characterized in that: The support plate is provided with a guide seat for use with the inner tube.

4. A method for sealing a high-water-level iron pipe dewatering well in a deep foundation pit, characterized by: The method comprises using the rubber airbag installation device for the high water level iron pipe dewatering well in a deep foundation pit as described in any one of claims 1 to 3 for construction; The following steps are also included: S1: Chisel the wellhead in the circumferential direction at an angle of a° to the axial direction of the well, with a chiseling depth of 12-18 cm and an angle of 40-50°; S2: Two positioning holes are machined at the same height 7-10 cm below the wellhead of the iron pipe well. After machining, the rubber airbag is clamped by a rubber airbag installation device and released downward into the iron pipe dewatering well; S3: After the rubber airbag is released downward to the designated position, air is inflated into the rubber airbag to make it expand and tighten against the inner wall of the iron pipe well. After the rubber airbag is installed, observe whether the iron pipe well is tightly sealed. S4: Drain the water above the rubber airbag in the iron pipe well, and then use high-strength grouting material to grout the well space above the rubber airbag; S5: Install the plugging steel plate to the grouting area of ​​the high-strength grouting material, and weld the plugging steel plate to the inner wall of the iron pipe well by welding; S6: Install the casting template at the location where the iron pipe well mouth is chiseled out, install the locking parts at the positioning holes and connect and install them in conjunction with the casting template. After the template and the locking parts are installed, seal and cast the template inside and outside the well mouth.

5. The method for sealing a high-water-level iron pipe dewatering well in a deep foundation pit according to claim 4, characterized in that: A lifting rod is installed on the blocking steel plate.

Images