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Construction method for immersed tube prefabrication and transportation

A construction method and technology of immersed tubes, applied in artificial islands, water conservancy projects, infrastructure projects, etc., can solve the problem of high initial cost of dry dock method and factory method, low level of ordinary river channels, and inability to meet the navigation requirements of semi-submerged barges, etc. problems, to achieve the effect of reducing construction costs, saving initial costs, and reducing land occupation

Active Publication Date: 2021-05-25
CCCC FOURTH HARBOR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is: in view of the existing prefabrication methods of inland river immersed tunnels in the prior art, the dry dock method and the factory method have relatively high initial costs, and ordinary river courses The waterway grade of the semi-submerged barge is usually low, and often cannot meet the navigation requirements of the semi-submerged barge. A construction method for the prefabrication and shipment of immersed tubes is provided.

Method used

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  • Construction method for immersed tube prefabrication and transportation
  • Construction method for immersed tube prefabrication and transportation
  • Construction method for immersed tube prefabrication and transportation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as Figure 1-5 As shown, a construction method for immersed tube prefabrication and shipment described in this embodiment includes the following steps:

[0051] Step 1: Survey and construction environmental conditions:

[0052] If the water depth of the original river channel 6 is not enough to meet the draft when the barge floating immersed tube 5 is installed, it is necessary to dredge the immersed tube 5 floating channel to meet its basic draft.

[0053] Step 2: Set up a lifting platform system for the prefabricated immersed tube 5 in the area near the installation position 62 of the immersed tube in the river channel 6, and the prefabricated platform includes the lifting platform 1:

[0054] In order to shorten the floating distance and reduce the amount of channel dredging for the transshipment operation of the immersed tube 5 , a lifting platform 1 is set up near the installation position 62 of the immersed tube, and the platform is connected to the land out...

Embodiment 2

[0103] Such as Figure 8 As shown, a construction method for immersed tube prefabrication and shipping described in this application differs from Embodiment 1 in that: an auxiliary support beam 14 is provided at the bottom of the lifting platform 1, and the auxiliary support beam 14 A jacking device 141 is arranged between the lifting platform 1 , and at least one of the jacking devices 141 supports the middle part of the lifting platform 1 .

[0104]Specifically, there are at least two jacking devices 141 , and at least two jacking devices 141 are arranged at intervals along the length direction of the auxiliary support beam 14 .

[0105] The bottom of the lifting platform 1 is provided with an auxiliary support beam 14, and a jacking device 141 is provided between the auxiliary support beam 14 and the lifting platform 1 to assist in supporting the lifting platform 1. During use, if the middle part of the lifting platform 1 If the deflection is out of tolerance, use at least...

Embodiment 3

[0113] Such as Figure 9 As shown, a construction method for prefabrication and shipment of immersed tubes described in this application differs from Embodiment 1 or 2 in that: a bottom form 51 for prefabricating immersed tubes 5 is provided above the lifting platform 1, so Both sides on the lifting platform 1 are provided with supporting devices 13, and a jacking device 12 is arranged between the supporting devices 13 on both sides, and the jacking device 12 is arranged on the lifting platform 1. The supporting device 13 and the jacking device 12 are located below the bottom mold 51, and both support the bottom mold 51. Specifically, the position of the supporting device 13 corresponds to the position directly below the outer wall of the immersed tube 5, and all jacks Among the lifting devices 12 , at least two jacking devices 12 correspond directly below the partition wall of the immersed tube 5 .

[0114] Specifically, the lifting platform 1 is a truss structure, and there...

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Abstract

The invention relates to the field of immersed tube construction, and particularly relates to a construction method for immersed tube prefabrication and transportation. The construction method comprises the following steps that a lifting platform system for prefabricating an immersed tube is erected in the area near the installation position of the immersed tube in a riverway; the immersed tube is prefabricated on a lifting platform; the lifting platform descends, so that the immersed tube descends into water; and the immersed tube is transported to the installation position of the immersed tube in a floating mode. According to the lifting platform system for immersed tube prefabrication, the lifting platform for prefabricating the immersed tube is arranged in the riverway, so that the occupied area caused by immersed tube prefabrication is greatly reduced, foundation pit supporting and anti-seepage treatment are not needed, the early-stage cost is greatly saved, and then the cost of the whole immersed tube prefabrication construction is reduced; and the prefabrication position is located in the area near the installation position of the immersed tube, so that the engineering quantity for dredging a channel is greatly reduced, and the corresponding construction cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of immersed tube construction, in particular to a construction method for immersed tube prefabrication and shipping. Background technique [0002] At present, the prefabrication methods of immersed tube tunnels in inland rivers mainly include fixed dry dock method (excavation of foundation pit, prefabrication of immersed tubes in the pit, removal of dock door to release water after prefabrication), factory method (construction of land prefabrication factory) and mobile dry dock method ( Prefabrication directly on the semi-submerged barge). [0003] For the dry dock method, the geological conditions of the dry dock site must be good, that is, the foundation has sufficient bearing capacity, the slope condition is good, the anti-seepage effect of the foundation pit is good, and the cost for foundation pit support and anti-seepage treatment higher. For projects with small-scale immersed tube tunnels and a small number o...

Claims

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Application Information

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IPC IPC(8): E02D29/073E02D15/08B28B21/76
CPCE02D29/073E02D15/08B28B21/76
Inventor 董勇尹春辉张涛黄昌焕孙瞻曾可欣张克浩朱成周勇李冠星史朝杰陈翀陈健斌文俊健蒋国栋陈伟彬
Owner CCCC FOURTH HARBOR ENG CO LTD