Clay Waterstop Construction Method for Building Island Cofferdam in Foundation Pit of Linhe River

A construction method and technology for building island cofferdams, which can be applied in basic structure engineering, excavation, construction, etc., can solve problems such as high construction cost and long construction time period, reduce construction difficulty, reduce construction equipment investment, and speed up construction progress. Effect

Active Publication Date: 2017-06-30
成都华川公路建设集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above three water-stopping methods all have great limitations in scope of application, and the construction time period is long and the construction cost is high.
Not suitable for small rivers and deep foundation pits with small foundation pits

Method used

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  • Clay Waterstop Construction Method for Building Island Cofferdam in Foundation Pit of Linhe River
  • Clay Waterstop Construction Method for Building Island Cofferdam in Foundation Pit of Linhe River
  • Clay Waterstop Construction Method for Building Island Cofferdam in Foundation Pit of Linhe River

Examples

Experimental program
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Effect test

no. 1 example

[0054] see Figure 1 to Figure 9 , the present embodiment provides a construction method for water-stopping construction of an island cofferdam adjacent to a river foundation pit, which is suitable for small and medium-sized rivers. The bridge adjacent river cap 104 and the mid-river cap foundation pit 103 are used for construction of an island cofferdam. The construction method includes:

[0055] Construction of the island cofferdam S1001: construct the cofferdam 101 outside the preset position of the cap foundation pit 103.

[0056] Clay water stop wall construction S1002: construct a clay water stop wall 102 between the preset position of the cap foundation pit 103 and the cofferdam 101 .

[0057] Foundation Pit Excavation S1003: Excavate at the preset position of the platform foundation pit 103 to obtain the platform foundation pit 103 .

[0058] Hoisting of the inner mold support box S1008: Hoist the prefabricated inner mold support box 107 to a preset position in the p...

no. 2 example

[0088] see Figure 1 to Figure 10 , the present embodiment provides a construction method for water-stopping construction of an island-building cofferdam with adjacent river foundation pit, and the specific steps of the construction method are as follows:

[0089] Construction preparation S1006:

[0090] Construction technical preparation: design the cofferdam 101 according to the structural size of the cap 104 and its position in the river channel 111, including the form of filling materials, the structural size of the cofferdam 101, the design of the internal mold support box 107 and the formulation of specific construction technical requirements .

[0091] Material preparation: The materials of the cofferdam 101 are mainly Raschel steel wire gabion, building slag, and pebbles, and the island building materials are sand and gravel, water-stop clay, and building slag.

[0092] Mechanical preparation: According to the engineering volume of the cofferdam 101 project and the c...

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Abstract

The invention provides a river-adjacent-foundation-pit island-building cofferdam clay sealing construction method, and belongs to the technical field of river deep-foundation-pit project sealing. The river-adjacent-foundation-pit island-building cofferdam clay sealing construction method includes the steps of island building cofferdam construction, wherein a cofferdam is constructed outside a preset position of a foundation pit; clay sealing wall construction, wherein a clay sealing wall is constructed between a preset position of the foundation pit and the cofferdam; foundation pit excavation, wherein excavation is carried out at a preset position of the foundation pit to obtain the foundation pit; inner formwork supporting box hoisting, wherein a prefabricated inner formwork supporting box is hoisted to a preset position in the foundation pit, positioned and reinforced; bearing platform construction, wherein the foundation pit is subjected to pouring to obtain a bearing platform; and inner formwork supporting box disassembling, cofferdam disassembling and river cleaning. According to the construction method, as the clay sealing wall is arranged, the physical characteristics of high sealing performance and plasticity of clay are used, the sealing requirement of the river-adjacent bearing platform foundation pit is met, and the sealing effect of the foundation pit is achieved; and as the inner formwork supporting box is hoisted, it is guaranteed that construction of the deep foundation pit is safe and stable, and meanwhile the inner formwork supporting box can serve as a bearing platform formwork.

Description

technical field [0001] The invention relates to the technical field of water stop technology for deep foundation pit engineering in river channels, in particular to a clay water stop construction method for building islands and cofferdams adjacent to river foundation pits. Background technique [0002] At present, small and medium-sized river bridges account for more than 85% of the total number of existing bridges. The foundation pits of caps in the river and adjacent river caps are very common. The turbulent river not only affects the dewatering efficiency of caps foundation pits, but also causes the enclosure structure to bear a large osmotic pressure, which adds a certain amount of technology to the dewatering of deep foundation pits. difficulty. [0003] The key to the construction technology of deep foundation pit engineering adjacent to the river is water stop treatment. The groundwater in the river course is rich and buried deep, and the foundation pit support proje...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/02E02D19/04E02D17/02
CPCE02D17/02E02D19/02E02D19/04
Inventor 王雅民谢应文骆小红苏昌茂黄飞王先军
Owner 成都华川公路建设集团有限公司
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