Jacking method applied to large caisson
A caisson and jacking technology, which is applied in the direction of caissons, buildings, and infrastructure engineering, etc., can solve the problems of potential safety hazards, small weight of jacking caissons, and high pressure of jacking airbags, so as to achieve strong practicability, improve the scope of application, and improve The effect of jacking height
Active Publication Date: 2016-12-14
CRCC HARBOR & CHANNEL ENG BUREAU GRP
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Problems solved by technology
Compared with the previous method, the caisson airbag jacking and transportation process does not require the construction of complicated tracks and has lower requirements for foundation treatment, but the height of the caisson jacking is greater than the height of the subsequent construction interspersed with rolling airbags. For large caissons, its When the synchronous jacking process is used to lift the caisson, the jacking air bag has a strong pressure, and the cost of manufacturing the ultra-high pressure air bag is high, and there is a large safety hazard during construction, resulting in a small weight of the jacking caisson by this process , which limits the spread of the process
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Embodiment 2
[0056] For another example 2, refer to figure 1 , a jacking method applied to a large caisson, comprising the following steps:
[0057] 1). Lay the main airbag 1, and arrange four airbag grooves 4 at the predetermined position below the caisson 2 according to the size of the prefabricated caisson 2 on the prefabrication field 3 conforming to the prefabrication of the caisson 2. The width of the airbag groove 4 is 1.1m. The height is 20cm, and the main airbag 1 is laid in the airbag ditch 4;
[0058] 2). For the first jacking, inflate the main airbag 1 in the airbag ditch 4, the air pressure of the main airbag 1 near the front side of the caisson 2 is higher than the inflation pressure of the main airbag 1 near the back side of the caisson 2, so that the front side of the caisson 2 Lift 15cm;
[0059] 3). Lay the front auxiliary airbag 5, lay the auxiliary airbag 5 in the gap between the front side of the caisson 2 and the prefabrication yard 3, and inflate the auxiliary airb...
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The invention discloses a jacking method applied to a large caisson. The jacking method includes the following steps that firstly, main air bags are laid; secondly, primary jacking is conducted; thirdly, front-side auxiliary air bags are laid; fourthly, front-side cushion layers are laid; fifthly, secondary jacking is conducted; sixthly, rear-side auxiliary air bags are laid; seventhly, middle lower-side auxiliary air bags are laid; eighthly, rear-side cushion layers are laid; ninthly, the cushion layers are balanced; and tenthly, the air bags are removed. Compared with an original traditional method, the jacking method has the beneficial effects that all the air bags are different in pressure intensity, the front edge and the rear edge of the caisson are jacked to be at different heights multiple times, and a manner for multiple times of supporting and cushioning is adopted in the process, so that the pressure intensity of the jacking air bags can be reduced, higher safety is achieved in the construction process, and practicability is high; and in addition, the jacking height of the caisson can be effectively increased, the requirement for shipping larger caissons is met, the application range of shipping the caissons through the air bags is better enlarged, and the jacking method can be rapidly popularized in the whole industry.
Description
technical field [0001] The invention relates to the technical field of on-site construction, in particular to a jacking method applied to large caissons. Background technique [0002] At present, the application of caissons in domestic gravity wharves is very common. After the caisson is prefabricated in the land prefabrication yard, it needs to be moved to a large ship through the wharf, and then transported to the site for installation. The jacking of the caisson to the design height is the most difficult point of construction. [0003] Currently, there are two methods of jacking up such large caissons: [0004] One construction technique is to lift the caisson off the ground with jacks or water-injected capsules. Since the caisson is located on the trolley in this lifting method, there is no requirement for the jacking height, and it only needs to be off the ground. Currently, the largest The weight of the caisson is 9000t. This method of transportation is efficient an...
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IPC IPC(8): E02D23/00
CPCE02D23/00
Inventor 时学海姜正凯杨洪革丁瑞明孙波张盖新毛启波赵宪良李玉峰
Owner CRCC HARBOR & CHANNEL ENG BUREAU GRP