Waterproof construction of new and old basement structures

Abstract

The utility model discloses a waterproof structure of an old and new basement structure, including an original basement structure, a newly added basement structure is arranged on one side of the original basement structure, a post-cast strip is arranged on the side of the newly added basement structure opposite to the original basement structure, an expansion agent is arranged inside the post-cast strip, and an external waterproof waterstop is arranged at the connection between the post-cast strip and the original basement structure and at the connection between the post-cast strip and the newly added basement structure. The utility model arranges a post-cast strip at the junction of the old and new basement structures through the design of the post-cast strip, the expansion agent, the water-swelling rubber waterstop and the reinforcement, and adds the expansion agent to the cement poured into the post-cast strip to further make the concrete dense, ensure the self-waterproof effect of the structure, and effectively protect the water-swelling rubber waterstop, and use the external waterproof waterstop to reinforce the joint, so as to increase the waterproof performance.

Description

Technical Field

[0001] The utility model relates to the technical field of waterproof structures, in particular to a waterproof structure of new and old basement structures. Background Art

[0002] In some projects, in order to meet usage needs, the original basement or underground garage needs to be expanded and connected, and the waterproofing system of the original basement or underground garage exterior wall needs to be destroyed.

[0003] When building a new basement, there are problems such as seepage and leakage at the joints between the old and new concrete of the original basement and the newly built basement due to uneven concrete, which affects the normal use of the underground structure. Utility Model Content

[0004] The purpose of the utility model is to provide a waterproof structure for old and new basement structures to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waterproof structure of an old and new basement structure, including an original basement structure, a newly added basement structure is arranged on one side of the original basement structure, a post-cast strip is arranged on the side of the newly added basement structure opposite to the original basement structure, an expansion agent is arranged inside the post-cast strip, an external waterproof waterstop is arranged at the connection between the post-cast strip and the original basement structure and at the connection between the post-cast strip and the newly added basement structure, a water-swelling rubber waterstop is arranged on the side opposite to the newly added basement structure, and a reinforcement member for strengthening the connection between the original basement structure, the post-cast strip and the newly added basement structure is arranged on one side of the original basement structure.

[0006] Preferably, a mounting hole is provided on the side of the post-cast strip opposite to the newly added basement structure, and the water-swellable rubber waterstop is inserted and connected inside the mounting hole.

[0007] Preferably, the reinforcement member comprises a first pile borehole opened on one side of the original basement structure, and a first reinforcing steel bar is inserted and connected inside the first pile borehole.

[0008] Preferably, the first reinforcing steel bars are inserted and connected at one side of the post-cast strip, and the interior of the newly added basement structure is inserted and connected with second reinforcing steel bars.

[0009] Preferably, the reinforcement member further comprises a plurality of second pile boreholes opened on one side of the original basement structure, and the interiors of the plurality of second pile boreholes are respectively interspersed and connected with outer steel bars and inner steel bars.

[0010] Preferably, the outer steel bars and the inner steel bars are both inserted and connected inside the post-cast strip, and the outer steel bars and the inner steel bars are both inserted and connected inside the first reinforcing steel bars.

[0011] Technical effects and advantages of the utility model:

[0012] The utility model arranges a post-cast strip at the joint of the new and old basement structures through the designs of the post-cast strip, the expansion agent, the water-swelling rubber waterstop and the reinforcement member, and adds the expansion agent to the cement poured into the post-cast strip to further compact the concrete, ensure the self-waterproof effect of the structure, effectively protect the water-swelling rubber waterstop, and use the external waterproof waterstop to reinforce the joint, thereby increasing the waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0014] In the figure: 1. External waterproof waterstop; 2. Post-cast strip; 21. Expansion agent; 3. First reinforcing steel bar; 31. Second reinforcing steel bar; 4. Water-expanding rubber waterstop; 5. New basement structure; 51. Outer steel bar; 52. Inner steel bar; 6. Original basement structure. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] The utility model provides Figure 1 The waterproof structure of the new and old basement structures shown in the figure includes an original basement structure 6, a newly added basement structure 5 is arranged on one side of the original basement structure 6, a post-cast strip 2 is arranged on the side of the newly added basement structure 5 opposite to the original basement structure 6, an expansion agent 21 is arranged inside the post-cast strip 2, and an external waterproof waterstop 1 for waterproofing is arranged at the connection between the post-cast strip 2 and the original basement structure 6 and at the connection between the post-cast strip 2 and the newly added basement structure 5, a water-swellable rubber waterstop 4 is arranged on the side opposite to the post-cast strip 2 and the newly added basement structure 5, a reinforcement member for strengthening the connection between the original basement structure 6, the post-cast strip 2 and the newly added basement structure 5 is arranged on one side of the original basement structure 6, an installation hole is opened on the side opposite to the post-cast strip 2 and the newly added basement structure 5, and the water-swellable rubber waterstop 4 is inserted and connected inside the installation hole.

[0017] It should be noted that the water-swellable rubber waterstop 4 is a material commonly used in construction projects. It can swell when soaked in water, fill gaps, and play a role in waterproofing and sealing; the external waterproof waterstop 1 is a waterproof material commonly used in construction projects, usually composed of a waterproof membrane and an adhesive, and is used to be attached to the surface of the building structure to prevent moisture penetration; at the junction of the newly added basement structure 5 and the original basement structure 6, a post-cast strip 2 is set, and an expansion agent 21 is added to the cement poured into the post-cast strip 2 to further compact the concrete, ensure the self-waterproof effect of the structure, and effectively protect the water-swellable rubber waterstop 4, and the external waterproof waterstop 1 is used to strengthen the junction between the post-cast strip 2 and the newly added basement structure 5 and the original basement structure 6, thereby increasing the waterproof performance.

[0018] Specifically, the reinforcement includes a first pile borehole opened on one side of the original basement structure 6, the first pile borehole is interspersed with a first reinforcing steel bar 3, the first reinforcing steel bar 3 is interspersed and connected to one side of the post-cast zone 2, and the new basement structure 5 is interspersed with a second reinforcing steel bar 31.

[0019] Specifically, the reinforcement also includes a plurality of second pile boreholes opened on one side of the original basement structure 6, and the interiors of the plurality of second pile boreholes are respectively interspersed with outer steel bars 51 and inner steel bars 52, and the outer steel bars 51 and inner steel bars 52 are both interspersed and connected inside the post-cast zone 2, and the outer steel bars 51 and inner steel bars 52 are both interspersed and connected inside the first reinforcing steel bars 3.

[0020] It should be noted that the first reinforcing steel bar 3 , the second reinforcing steel bar 31 , the outer steel bar 51 and the inner steel bar 52 are all used to increase the connection between the newly added basement structure 5 , the original basement structure 6 and the post-cast strip 2 .

[0021] The first step is to position and lay out the lines and roughen the surface of the original structure;

[0022] After the original basement structure 6 is excavated, the surface debris is cleaned, and the position of the newly added basement structure 5 is laid out according to the drawings and the axis grid of the building and structure, and the surface of the original structure is roughened until the main steel bars are exposed.

[0023] The second step is to make and install new structural steel bars and reinforcing steel bars;

[0024] Position at the original structure, release the newly added structural steel bars (outer steel bars 51 and inner steel bars 52) and the first reinforcing steel bars at 3 points, drill holes, and clean them. To ensure the waterproof effect, the spacing between the newly added structural steel bars and the first reinforcing steel bars 3 is required to be no more than 150mm. The newly added structural steel bars and the first reinforcing steel bars 3 should be drilled when they are implanted. During the construction process, the depth of the pile drilling is strictly controlled, and the relevant units are required to inspect the holes to see if the depth meets the design requirements. If it meets the design requirements, drill holes, clean them, implant the steel bars, inject the rebar embedding glue, and complete the steel bar implantation work.

[0025] Since there are steel bars in the original structure, in order to ensure safety and waterproofing, before construction, it is advisable to use instruments to check the position of the steel bars to ensure that the original structural steel bars are avoided when drilling to ensure the safety of the original structure.

[0026] Step 3: Construction of new basement structure 5;

[0027] According to the construction drawings, 500 to 800 mm is reserved on the original structure surface as post-casting strip 2, and the rest is constructed according to normal construction procedures.

[0028] The fourth step is to install the water-swellable rubber waterstop 4;

[0029] The water-swellable rubber waterstop 4 is installed along the entire length of the structure and is fixed and glued with an adhesive to prevent it from falling off and losing the waterproof effect.

[0030] Step 5: pouring of post-casting strip 2;

[0031] After the strength and maintenance of the newly added basement structure 5 meet the requirements, the pouring of the post-cast joint 2 can be started. Usually, concrete with a strength grade one level higher than that of the newly added basement structure 5 is used for pouring, and 8% to 12% of the expansion agent 21 is added. When pouring, the construction site should be cleaned and fully moistened, and it should be fully vibrated and compacted during pouring. After pouring, the final setting of the belt is completed and moist maintenance begins. The maintenance period is not less than 14 days.

[0032] Step 6: Installation of the external waterproof waterstop 1;

[0033] After the curing of the post-cast strip 2 is completed, the formwork is removed and the installation of the external waterproof waterstop 1 is started. Before installation, a certificate of material quality should be provided, and on-site sampling inspection should be carried out before construction. The installation of the external waterproof waterstop 1 should be firm and tightly attached to the structure.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waterproof structure of an old and new basement structure, comprising an original basement structure (6), a newly added basement structure (5) being arranged on one side of the original basement structure (6), characterized in that: A post-cast strip (2) is arranged on the side of the newly added basement structure (5) opposite to the original basement structure (6), an expansion agent (21) is arranged inside the post-cast strip (2), an external waterproof waterstop (1) is arranged at the connection between the post-cast strip (2) and the original basement structure (6) and at the connection between the post-cast strip (2) and the newly added basement structure (5), a water-swellable rubber waterstop (4) is arranged on the side of the post-cast strip (2) opposite to the newly added basement structure (5), and a reinforcement member for strengthening the connection between the original basement structure (6), the post-cast strip (2) and the newly added basement structure (5) is arranged on one side of the original basement structure (6).

2. The waterproof structure of the new and old basement structure according to claim 1 is characterized in that: The post-cast strip (2) is provided with a mounting hole on one side opposite to the newly added basement structure (5), and the water-swellable rubber waterstop (4) is inserted and connected inside the mounting hole.

3. The waterproof structure of the new and old basement structure according to claim 1 is characterized in that: The reinforcement member comprises a first pile borehole opened on one side of the original basement structure (6), and a first reinforcing steel bar (3) is inserted and connected inside the first pile borehole.

4. The waterproof structure of the new and old basement structure according to claim 3 is characterized in that: The first reinforcing steel bar (3) is inserted and connected to one side of the post-cast strip (2), and the interior of the newly added basement structure (5) is inserted and connected to the second reinforcing steel bar (31).

5. The waterproof structure of the new and old basement structure according to claim 1 is characterized in that: The reinforcement member also includes a plurality of second pile boreholes opened on one side of the original basement structure (6), and the interiors of the plurality of second pile boreholes are respectively interlaced and connected with outer steel bars (51) and inner steel bars (52).

6. The waterproof structure of the new and old basement structure according to claim 5 is characterized in that: The outer steel bars (51) and the inner steel bars (52) are both inserted and connected inside the post-cast strip (2), and the outer steel bars (51) and the inner steel bars (52) are both inserted and connected inside the first reinforcing steel bars (3).

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