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Layered pouring multi-sinking open caisson construction process

A construction technology and layered pouring technology, which is applied in construction, caisson, infrastructure engineering, etc., can solve the problems of caisson sinking and inclined sinking, construction quality is difficult to guarantee, and construction technology requirements are high, so as to prevent shaft cracking and construction The effect of easy quality assurance and enhanced construction safety

Active Publication Date: 2017-07-18
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional caisson construction technology has many problems such as high construction technology requirements, difficult construction, difficult construction quality assurance, inclined or difficult sinking of caissons, etc.

Method used

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  • Layered pouring multi-sinking open caisson construction process
  • Layered pouring multi-sinking open caisson construction process

Examples

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Effect test

Embodiment 1

[0033] A caisson construction technology with layered pouring and multiple sinking, including construction of high-pressure jet grouting piles, excavation of foundation pits, laying of sand cushions and plain concrete cushions under blade feet, scaffolding erection, steel bar binding, and caisson formwork Steps of construction, concrete pouring, bottom formwork for brick-laying inclined planes with blade feet, chiseling of concrete cushions and sinking of caissons;

[0034] Construction of high-pressure jet-grouting piles: single-weight pipe construction is adopted, and the water-stop curtain of the pipe-jacking working well and the receiving well adopts high-pressure jet-grouting piles, the pile diameter is 600@400mm, and the cement adopts 42.5 grade ordinary Portland cement, and the water-cement ratio is 1 , the amount of cement is 150kg / m, and the unconfined compressive design strength of the cement soil of the pile body is 2.0MPa.

[0035] Foundation Pit Excavation: After ...

Embodiment 2

[0049] A caisson construction technology with layered pouring and multiple sinking, including construction of high-pressure jet grouting piles, excavation of foundation pits, laying of sand cushions and plain concrete cushions under blade feet, scaffolding erection, steel bar binding, and caisson formwork Steps of construction, concrete pouring, bottom formwork for brick-laying inclined planes with blade feet, chiseling of concrete cushions and sinking of caissons;

[0050] Construction of high-pressure jet-grouting piles: single-weight pipe construction is adopted, and the water-stop curtain of the pipe-jacking working well and the receiving well adopts high-pressure jet-jet jetting piles, the pile diameter is 600@400mm, the cement is 42.5 grade ordinary Portland cement, and the water-cement ratio is 0.8 , the amount of cement is 150kg / m, and the unconfined compressive design strength of the cement soil of the pile body is 2.0MPa.

[0051] Foundation Pit Excavation: After the...

Embodiment 3

[0065] A caisson construction technology with layered pouring and multiple sinking, including construction of high-pressure jet grouting piles, excavation of foundation pits, laying of sand cushions and plain concrete cushions under blade feet, scaffolding erection, steel bar binding, and caisson formwork Steps of construction, concrete pouring, bottom formwork for brick-laying inclined planes with blade feet, chiseling of concrete cushions and sinking of caissons;

[0066] Construction of high-pressure jet-grouting piles: single-weight pipe construction is adopted, and the water-stop curtains of the pipe-jacking working well and the receiving well are made of high-pressure jet-grouting piles, the pile diameter is 600@400mm, the cement is 42.5 grade ordinary Portland cement, and the water-cement ratio is 1.5 , the amount of cement is 150kg / m, and the unconfined compressive design strength of the cement soil of the pile body is 2.0MPa.

[0067]Foundation Pit Excavation: After t...

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Abstract

The invention discloses a layered pouring multi-sinking open caisson construction process. The construction process comprises the steps of high-pressure jet grouting pile construction, foundation pit excavation, sand cushion and plain concrete cushion laying below blade feet, scaffold erection, reinforcing steel bar binding, open caisson formwork plate construction, concrete pouring, blade foot brick bevel bottom formwork and concrete cushion chiseling and open caisson sinking. Compared with the traditional construction process, the open caisson construction process has the beneficial effects that the construction difficulty is effectively lowered, high-formwork support construction is effectively reduced, economy is saved, construction safety is enhanced, the construction quality is guaranteed easily, and an open caisson is not prone to inclining and is sunk easily in the construction process.

Description

technical field [0001] The invention belongs to the technical field of caisson engineering, and in particular relates to a caisson construction technology with layered pouring and multiple sinking. Background technique [0002] The caisson is a shaft-shaped structure. It excavates the soil in the well, relies on its own gravity to overcome the friction of the well wall and sinks to the design elevation, and then seals the bottom with concrete and fills the well hole to make it a bridge pier or other structures. The basics. It is generally used in the construction of foundation pits of large bridge piers, sewage pumping stations, large equipment foundations, civil air defense shelters, shield assembly wells, underground lanes and station hydraulic foundation construction enclosures. It is relatively safe and reliable in technology, with less soil excavation and less impact on adjacent buildings. The caisson foundation is buried deeply, has good stability, and can support lar...

Claims

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Application Information

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IPC IPC(8): E02D23/08E02D23/16
CPCE02D23/08E02D23/16E02D2250/0007E02D2250/0023E02D2300/002
Inventor 高泽海黄涛马龙王宇张弘明
Owner CCFED THE FIGTH CONSTR & ENG
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