CN1811068A

CN1811068A - New cofferdam construction process for building pier in deep water river

Info

Publication number: CN1811068A
Application number: CN 200510048420
Authority: CN
Inventors: 张雪松
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-10-14
Filing date: 2005-10-14
Publication date: 2006-08-02

Abstract

The present invention relates to new cofferdam construction process for building pier in deep water river. The construction process includes the following steps: building outer frame near the site to building pier, setting outer formworks outside the outer frame, building inner frame, setting inner formworks, filling soil between the outer formworks and the inner formworks to form cofferdam, pumping out water from inside the cofferdam, and constructing pier inside the cofferdam. The formwork construction process has effectively reduced soil filling amount, can facilitate the river water flow and flood release, and has the advantages of simple construction, low cost and other advantages.

Description

A kind of new cofferdam construction process for building pier in deep water river

Technical field: the present invention relates to a kind of new cofferdam construction process for building pier in deep water river suitable in a kind of bridge erection.

Background technology: at present, along with the high speed development of Chinese national economy, highway and railway construction also develop rapidly, and bridge erection then becomes the key project in the communications and transportation construction.Especially in medium and small river course bridge pier construction works, many now uses ponding water blockoff in the river course is gone into the korneforos with a large amount of earthwork heaps, carries out cofferdam construction then after the compacting.Because the amount of banketing is big, the one, hindered the proper flow of streamflow, the 2nd, after engineering construction is finished, banket that it is unclean not remove or remove, cause river course flowing water or flood discharge not smooth, caused unnecessary disaster.Part unit in charge of construction is also arranged, adopt the metal bucket cofferdam, but this way is to the medium and small project incompatibility, technical requirements of underwater operation is high, and investment is big, is not easy to transportation and construction, is unfavorable for recycling, and therefore is not easy to popularization.

Summary of the invention: the invention provides a kind of construction volume that reduced, save a kind of new cofferdam construction process for building pier in deep water river of cost.Described elder generation in the river course, design the bridge pier place build outside framed bent 2, framed bent 2 is placed outer template 1 near the steel pipe face outside, framed bent 5 in building, place internal layer template 4 at interior framed bent 5 near the steel pipe face, between outer template 1 and internal layer template 4, fill soil 3 then, ponding in the cofferdam 6 is extracted out, can in cofferdam 6, be carried out Bridge Pier Construction.Owing to used template fill construction new method in the bridge erection of the present invention, the thin-walled cofferdam is done in the piecemeal assembly, the amount of banketing be can reduce effectively, river course flowing water and flood discharge made things convenient for greatly, and construction and simple in structure, reduced construction volume, saved cost, and invested for a short time, the duration is short, it is easy to remove cleaning, thereby has good social benefit and economic benefit.

Description of drawings; Fig. 1 is a front view of the present invention

Fig. 2 is the lateral view of Fig. 1

The specific embodiment: shown in Figure 2 as Fig. 1, this job practices is framed bent 2 outside build at design bridge pier place in the river course earlier, and framed bent 2 is placed outer template 1 near the steel pipe face outside; Framed bent 5 in building is placed internal layer template 4 at interior framed bent 5 near the steel pipe face; Between outer template 1 and internal layer template 4, place Polypropylence Sheet then, fill soil 3 and place in the Polypropylence Sheet; Ponding in the cofferdam 6 is extracted out, can in cofferdam 6, be carried out Bridge Pier Construction.

The present invention is applicable to medium and small deep water river bridge construction engineering, can establish the single or multiple lift use according to discharge and flow velocity.

Claims

1, a kind of new cofferdam construction process for building pier in deep water river, it is characterized in that framed bent (2) outside earlier build at design bridge pier place in the river course, framed bent (2) is placed outer template (1) near the steel pipe face outside, build interior framed bent (5), place internal layer template (4) at interior framed bent (5) near the steel pipe face, between outer template (1) and internal layer template (4), fill soil (3) then, cofferdam (6) interior ponding is extracted out, can in cofferdam (6), carry out Bridge Pier Construction.

2, a kind of deep water river bridge pier cofferdam construction method according to claim 1 is characterized in that placing Polypropylence Sheet in the middle of outer template (1) and internal layer template (4), fills soil (3) and places in the Polypropylence Sheet.