CN201933514U - Leakage-prevention structure for 500KV underground substation - Google Patents

Abstract

The utility model relates to an anti-leakage structure of a 500KV underground substation. The structure includes a water-repellent interface spray layer, a rigid water-stop sheet, a temporary ring beam support, the main reinforcement of the foundation floor, a water-expandable water-stop strip, channel steel, and a water-stop steel plate , shear grooves, upsetting straight thread connectors, cushions, waterproofing agent interface shotcrete layer are set between the inner lining wall and the ground wall, temporary ring beam support is set on the inner lining wall, and rigid water-stop sheets are set on the inner lining wall On the temporary ring beam support, the main reinforcement of the foundation floor is set on the bottom plate, the water-swellable water-stop strip is set between the inner wall and the ground wall, the channel steel and the water-stop steel plate are set between the water-swellable water-stop strip, and the shear force The groove is arranged between the lining wall and the ground wall, the upsetting straight screw connector is arranged on the floor, and the cushion is arranged under the bottom plate. Compared with the prior art, the utility model has the advantages of high safety and durability, low construction difficulty, high construction efficiency, low engineering cost, social resource saving and the like.

Description

Anti-leakage structure of 500KV underground substation

technical field

The utility model relates to an anti-leakage structure, in particular to an anti-leakage structure for a 500KV underground substation.

Background technique

With the development of transportation, energy, and urban construction to the underground space, the problem of groundwater leakage and its harmfulness have attracted more and more attention from builders, especially in underground railways, tunnels, and hydropower plants. Because this kind of project is different from the basement leakage of general houses and buildings, they are buried deep in the ground, most of them bear a certain head pressure, and even the entire building is all below the groundwater level. The leakage is not only related to the quality of the underground engineering itself, but also closely related to the groundwater characteristics. Therefore, a large amount of water seepage and leakage for a long time will not only affect the safety and stability of the structure itself, but will even cause uneven settlement of other surrounding buildings.

Another important problem caused by leakage is the corrosion of steel reinforcement or concrete corrosion in the structure. The safety accidents caused by the corrosion of steel bars or concrete corrosion, etc., are far more serious than the harm caused by the low safety level of the bearing capacity of structural members. The problems caused by the aging of concrete and the corrosion of steel bars are universal, and the losses caused are incalculable.

With the process of urbanization, large and complex underground structures are constantly emerging. The high groundwater level in Shanghai and some cities in my country puts forward higher requirements for the anti-crack and anti-seepage of underground structures than previous structures. How to ensure good structural anti-seepage performance? This research topic has important practical significance and economic value for maintaining the good working performance of the structure and improving the durability. It meets the needs of the scientific development concept and the theme of the harmonious development of people and cities at the Shanghai World Expo. It reflects the spirit of the times and the future development direction.

The current technology has the following disadvantages: low safety and durability, high construction difficulty, low construction efficiency, expensive project cost, and a lot of waste of social resources.

Contents of the invention

The purpose of this utility model is to provide an anti-leakage structure of a 500KV underground substation with high safety and durability, low construction difficulty, high construction efficiency, low engineering cost and social resource saving in order to overcome the above-mentioned defects in the prior art .

The purpose of the utility model can be achieved through the following technical solutions: the anti-leakage structure of the 500KV underground substation, which is characterized in that the structure includes a waterproofing agent interface spray layer, a rigid water stop sheet, a temporary ring beam support, the main reinforcement of the foundation floor, Water-swellable water-stop strips, channel steel, water-stop steel plates, shear grooves, upsetting straight thread connectors, cushions, and the waterproofing agent interface shotcrete layer is set between the inner lining wall and the ground wall. The temporary ring beam support is set on the lining wall, the rigid water-stop sheet is set on the temporary ring beam support, the main reinforcement of the foundation bottom plate is set on the bottom plate, and the water-expandable water-stop strip is set on the Between the lining wall and the ground wall, the channel steel and the water-stop steel plate are arranged between the water-expandable water-stop strips, the shear groove is arranged between the lining wall and the ground wall, and the upsetting The coarse straight screw connector is arranged on the floor, and the cushion layer is arranged under the bottom plate.

The channel steel is welded with the main reinforcement.

The waterproof steel plate is welded to the main reinforcement.

The upsetting straight thread connector is connected with the main reinforcement of the bottom plate.

A waterproof mortar layer is provided between the cushion layer and the bottom plate.

Compared with the existing technology, this utility model adopts a number of new technologies on the basis of this research in Shanghai 500kV Jingan (World Expo) power transmission and transformation project, and solves a series of technical problems in design and construction in terms of anti-leakage , not only improved the safety and durability of the structure, reduced the construction difficulty, improved the construction efficiency, and greatly reduced the project cost, but also ensured that the major projects of the Shanghai 2010 World Expo were completed on time, and achieved significant results. The social and economic benefits are very significant .

Based on the development and application of the utility model in terms of theoretical analysis, design, construction and testing, the smooth and successful implementation of the 500kV Jing'an (World Expo) power transmission and transformation project in Shanghai has been ensured, and the quality and construction period of the major projects of the Shanghai 2010 World Expo have been guaranteed. , effectively protected the surrounding environment, greatly saved social resources, and achieved significant social and economic benefits.

Description of drawings

Figure 1 is a diagram of the waterproof structure between the underground diaphragm wall, the base plate and the lining wall.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1, the anti-seepage structure of a 500KV underground substation includes a waterproofing agent interface shotcrete layer 1, a rigid water-stop sheet 2, a temporary ring beam support 3, the main reinforcement of the foundation floor 4, and a water-swellable water-stop strip 5 , channel steel 6, water-stop steel plate 7, shear groove 8, upsetting straight thread connector 9, cushion layer 10, waterproofing agent interface shotcrete layer 1 is set between the inner lining wall 11 and the ground wall 12, the temporary ring The beam support 3 is set on the inner lining wall 11, the rigid water-stop sheet 2 is set on the temporary ring beam support 3, the main reinforcement 4 of the foundation floor is set on the bottom plate 13, and the water-expandable water-stop strip 5 is set on the inner lining wall 11 and the ground Between the walls 12, the channel steel 6 and the water-stop steel plate 7 are set between the water-expandable water-stop strips 5, the shear groove 8 is set between the lining wall 11 and the ground wall 12, and the upsetting straight thread connector 9 Arranged on the floor, the underlayment 10 is arranged below the floor 13 . The channel steel 6 is welded with the main reinforcement. The waterproof steel plate 7 is welded with the main reinforcement. The upsetting straight thread connector 9 is connected with the main rib 4 of the bottom plate. A waterproof mortar layer is provided between the cushion layer 10 and the bottom plate 13 .

The anti-leakage method of 500KV underground substation is realized through the following four aspects:

(1) In terms of structure design of anti-seepage underground substation

1) Comprehensively and systematically proposed a complete set of design methods for the waterproofing of deep underground substation structures with the circular reverse method, including the waterproof design of the underground diaphragm wall, lining wall, roof and foundation floor itself, and the waterproof node structure of the structural joints. A systematic waterproof design is proposed for the key waterproof parts of the interface between the structure body of the deep underground substation and the external tunnel.

2) For the first time, the I-shaped groove section joint technology of ultra-deep underground diaphragm wall without locking pipe or joint box was proposed and applied for a patent. This patented technology reduced the construction difficulty of ultra-deep underground diaphragm wall, improved construction efficiency, and successfully The integrity and waterproofness of the ultra-deep underground diaphragm wall joints are ensured.

(2) In terms of structural materials

1) Based on the research on the basic performance requirements of concrete materials for the construction and operation of Shanghai 500KV Jing'an (Expo) Power Transmission and Transformation Project, a self-waterproof concrete suitable for this project was developed.

2) Aiming at the key issues of crack resistance analysis of large-area roof structures, the main beam model and the beam-slab model were simulated to simulate the actual constraint conditions, and the numerical analysis method was used to calculate and compare the early crack resistance performance of concrete under different curing methods and different curing times. In the design and construction of large-area roofs, targeted anti-cracking measures such as wet curing and reinforced reinforcement are adopted.

3) Aiming at the key issues of the crack resistance analysis of the inner wall concrete under the constraints of the underground diaphragm wall, the field measurement results are used to invert the boundary conditions of the inner wall and the underground diaphragm wall, and the early crack resistance of the inner wall concrete is simulated by the numerical analysis method. Crack performance; in the design and construction of the inner lining wall, targeted anti-cracking measures such as local densified structural reinforcement of the inner lining wall near the side corners and edges of the underground diaphragm wall, prolonging the form removal time, and strengthening maintenance were adopted.

4) Aiming at the key issues of crack resistance analysis of floor concrete under the constraints of one column and one pile, considering the constraints of one column and one pile on the floor of the underground structure, the calculation and comparison of the two working conditions with and without the constraint condition of one column and one pile, quantified a The impact of column-pile constraint on the early performance of the floor concrete; in the design and construction of the floor, targeted anti-cracking measures such as dense reinforcement of the floor around a column and a pile, and strengthening of wet curing are adopted.

(3) In the construction of anti-seepage underground substation structure

1) Aiming at the characteristics of "upper softness and lower hardness" in Shanghai strata and combining the characteristics of the mechanical capacity of various types of underground diaphragm walls at the present stage, the new technology of underground diaphragm walls "combined with grasping and milling" is innovatively proposed, which ensures that the underground diaphragm walls The construction quality is improved, and at the same time, the construction efficiency of the underground diaphragm wall is improved.

2) Based on the anti-leakage design of Shanghai 500KV Jing'an (Expo) power transmission and transformation project structure, aiming at the corresponding key parts and weak links, combined with the specific working conditions of reverse construction, systematically studied the waterproof construction technology of deep underground substation structure, which guaranteed the project Excellent anti-seepage construction quality, satisfactorily realized the design intent.

(4) In terms of anti-seepage inspection of underground substation structures

1) Based on the comprehensive investigation of structural anti-seepage detection methods, the on-site and laboratory test methods for the structural anti-seepage performance of deep underground substations are clarified, providing relevant basis for the structural anti-seepage acceptance of Shanghai 500KV Jing'an (Expo) Power Transmission and Transformation Project.

2) The seepage prevention effect of the Shanghai 500KV Jing'an (Expo) power transmission and transformation project was tested on-site by means of ultrasonic, water pressure and water injection tests. The test results show the good performance of the structure itself in terms of anti-leakage.

Shanghai 500kV Jing'an (Expo) Power Transmission and Transformation Project, on the basis of this research, innovatively adopted a number of new technologies to solve a series of technical problems in design and construction in terms of anti-leakage, which not only improved the safety of the structure It reduces the construction difficulty, improves the construction efficiency, and greatly reduces the project cost. At the same time, it ensures that the major projects of the Shanghai 2010 World Expo will be completed on time, and significant results have been achieved. The social and economic benefits are very significant.

(1) Through this anti-seepage analysis, the optimized diaphragm wall can meet the anti-seepage requirements. This alone saves about 15,000m3 of concrete for the project, reduces about 90,000m3 of mud discharge, and saves about 30 million yuan in project cost.

(2) Through the crack resistance analysis of the structural floor, the concrete volume was saved by about 6600m3, and the project cost was saved by about 6.6 million yuan.

(3) Combined with the application of the new technology of "grasping and milling combination" of the underground diaphragm wall and the ultra-deep I-shaped groove section joint, the construction efficiency of the underground diaphragm wall has been greatly improved, and the construction period of the underground diaphragm wall has been shortened. The individual project of the underground diaphragm wall saved about 3 months.

(4) This project adopts the ultra-deep I-shaped groove section joint technology, which solves the problem that the lock pipe or joint box encountered in this project is difficult to pull out in general construction technology, greatly reduces the construction difficulty and improves the construction efficiency. efficiency.

Based on the development and application of the technical aspects of theoretical analysis, design, construction and testing, the Shanghai 500kV Jing’an (World Expo) power transmission and transformation project can be successfully implemented, and the quality and construction period of the major projects of the Shanghai 2010 World Expo are guaranteed. The surrounding environment is well protected, social resources are greatly saved, and significant social and economic benefits have been achieved.

Claims (5)

1. The anti-leakage structure of the 500KV underground substation, which is characterized in that the structure includes a waterproofing agent interface shotcrete layer, a rigid water-stop sheet, a temporary ring beam support, the main reinforcement of the foundation floor, water-expandable water-stop strips, channel steel, water-stop Steel plates, shear grooves, upsetting straight thread connectors, cushions, the waterproofing agent interface shotcrete layer is set between the inner lining wall and the ground wall, and the temporary ring beam support is set on the inner lining wall , the rigid water-stop sheet is set on the temporary ring beam support, the main reinforcement of the foundation floor is set on the bottom plate, the water-expandable water-stop strip is set between the inner lining wall and the ground wall, and the The channel steel and the water-stop steel plate are arranged between the water-expandable water-stop strips, the shear groove is arranged between the lining wall and the ground wall, and the upsetting straight thread connector is arranged on the floor, so The cushion layer mentioned above is arranged under the bottom plate. 2. The anti-leakage structure of the 500KV underground substation according to claim 1, wherein the channel steel is welded to the main reinforcement. 3. The anti-leakage structure of the 500KV underground substation according to claim 1, characterized in that the waterproof steel plate is welded to the main reinforcement. 4. The anti-leakage structure of 500KV underground substation according to claim 1, characterized in that, the upsetting straight screw connector is connected with the main reinforcement of the bottom plate. 5. The anti-leakage structure of 500KV underground substation according to claim 1, characterized in that a waterproof mortar layer is arranged between the cushion and the bottom plate.

Images