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Construction method utilizing blown sand cofferdam as cast-in-situ box beam support foundation

A technology for foundation construction and cofferdam, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of difficult construction, difficult dismantling, complicated processes, etc., and achieve high utilization efficiency, high practical value, and method steps. simple effect

Active Publication Date: 2017-01-04
CCTEB INFRASTRUCTURE CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a sand blowing cofferdam as a construction method for the cast-in-place box girder bracket foundation, which has simple steps, convenient construction, small settlement, and easy dismantling, can complete the construction of the bracket foundation relatively quickly, and can solve existing problems. The construction method has problems such as difficult construction, complicated process, and difficult demolition

Method used

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  • Construction method utilizing blown sand cofferdam as cast-in-situ box beam support foundation
  • Construction method utilizing blown sand cofferdam as cast-in-situ box beam support foundation

Examples

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Embodiment 1

[0028] see Figure 1~2 , in an embodiment of the present invention, a sand blowing cofferdam is used as a construction method for the cast-in-place box girder support foundation, comprising the following steps:

[0029] Step 1. Surveyors measure and locate the plane position and elevation of the sandbag cofferdam;

[0030] Step 2. Before the laying of the soft row 1, the GPS navigation and positioning system is used to measure and locate it. If there are sharp objects, take measures to deal with them immediately to ensure that the row is not damaged. And use the mud pump set equipped on the sand blowing ship to flush and fill the sand rib 2 in time to prevent the soft body row 1 from being washed away by water flow and waves, and tighten the filling port when it is full; the filling rate of the sand rib 2 is 80%; The overlapping length of two adjacent soft-body rows 1 shall not be less than 2000mm for underwater construction and not less than 1000mm for underwater constructio...

Embodiment 2

[0041] see Figure 1~2 , in an embodiment of the present invention, a sand blowing cofferdam is used as a construction method for the cast-in-place box girder support foundation, comprising the following steps:

[0042] Step 1. Surveyors measure and locate the plane position and elevation of the sandbag cofferdam;

[0043] Step 2. Before the laying of the soft row 1, the GPS navigation and positioning system is used to measure and locate it. If there are sharp objects, take measures to deal with them immediately to ensure that the row is not damaged. And use the mud pump set equipped on the sand blowing ship to flush and fill the sand rib 2 in time to prevent the soft body row 1 from being washed away by water flow and waves, and tighten the filling port when it is full; the filling rate of the sand rib 2 should be 85%; The overlapping length of two adjacent pieces of software row 1 shall not be less than 2000mm for underwater construction and not less than 1000mm for underwa...

Embodiment 3

[0053] see Figure 1~2 , in an embodiment of the present invention, a sand blowing cofferdam is used as a construction method for the cast-in-place box girder support foundation, comprising the following steps:

[0054] Step 1. Surveyors measure and locate the plane position and elevation of the sandbag cofferdam;

[0055] Step 2. Before the laying of the soft row 1, the GPS navigation and positioning system is used to measure and locate it. If there are sharp objects, take measures to deal with them immediately to ensure that the row is not damaged. And use the mud pump set equipped on the sand blowing ship to fill the sand rib 2 in time to prevent the soft body row 1 from being washed away by water flow and waves, and tighten the filling port when it is full; the filling rate of the sand rib 2 should be 90%; The overlapping length of two adjacent pieces of software row 1 shall not be less than 2000mm for underwater construction and not less than 1000mm for underwater constr...

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Abstract

The invention discloses a construction method utilizing a blown sand cofferdam as a cast-in-situ box beam support foundation. The method is used for cast-in-situ box beam construction and comprises the following steps of: (1) performing preparation of construction; (2) clearing foundation, and laying geotextile soft body mattress; (3) filling a bank core sandbag and an geotextile tube bag, i.e., after the soft body mattress is laid, firstly clearing and sweeping the soft body mattress, and then performing a bag filling construction process, wherein bag filling construction is divided into bank core sandbag filling and geotextile tube bag sand filling; (4) blowing and filling the cofferdam with sand, i.e., after a certain engineering work load of sandbag filling embank construction is performed, performing bank core sand filling, and performing parallel construction on edge bodies on two sides and bank core loose sand; (5) discharging water and performing compaction; (6) paving crushed rock; and (7) casting concretes to form a support foundation. The method has the characteristics of simple steps, simplicity and convenience in construction, safety, environmental friendliness, less sedimentation and the like, and can ensure that the line shape of a bridge box beam structure meets the design and standards.

Description

technical field [0001] The invention relates to the technical field of bridge cast-in-place box girder support construction, in particular to a construction method for sand-blowing cofferdams used as cast-in-place box girder support foundations. Background technique [0002] At present, in the construction of cast-in-place box girders of bridges over water, the method of laying steel pipe piles in water is generally used as the foundation for the construction of box girder supports. This method is difficult to construct, complex in process and difficult to dismantle. Therefore, it is necessary to design a support foundation with simple method steps, simple construction, small settlement and easy removal. Contents of the invention [0003] The purpose of the present invention is to provide a sand blowing cofferdam as a construction method for the cast-in-place box girder bracket foundation, which has simple steps, convenient construction, small settlement, and easy dismantl...

Claims

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Application Information

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IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 戴小松叶亦盛段军朝陈琳王军舰
Owner CCTEB INFRASTRUCTURE CONSTR CO LTD
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