CN106284362A

CN106284362A - A kind of construction method of single catheter perfusion Large Underwater bottom concrete

Info

Publication number: CN106284362A
Application number: CN201610643900.7A
Authority: CN
Inventors: 唐顶峰; 刘玉兰; 万华
Original assignee: Hunan Road and Bridge Construction Group Co Ltd
Current assignee: Hunan Road and Bridge Construction Group Co Ltd
Priority date: 2016-08-09
Filing date: 2016-08-09
Publication date: 2017-01-04
Anticipated expiration: 2036-08-09
Also published as: CN106284362B

Abstract

The invention discloses the construction method of a kind of single catheter perfusion Large Underwater bottom concrete, including: 1. start setting-out perfusion bottom concrete by conduit by the underwater concreting technique initial position from cofferdam or one end of steel jacket box, until this initial position bottom concrete reaches design height；2. after setting-out perfusion position bottom concrete reaches design thickness, conduit is extracted with crane gear, connection plugging hood in the base opening installation activity of conduit, then in the conduit install plugging hood, a little bottom concrete occlusion catheter is pumped with sky pump, with crane, this conduit moves to irrigate the reach at bottom concrete dilation angle edge again layout position ....The present invention can avoid mud foreign material to cover bottom concrete and form weak interlayer defect, can the complicated support of center of reduction storing basin, reduce multiple chute, reduce and overlap steel conduit more, reduce and overlap lifting appliance more, construction technology is simply, easy and simple to handle, reduction construction cost.

Description

A kind of construction method of single catheter perfusion Large Underwater bottom concrete

Technical field

The invention belongs to cofferdam in engineering construction, casing bottom concrete method for filling under water, be specifically related to one and singly lead The construction method of pipe perfusion Large Underwater bottom concrete.

Technical background

The construction of cofferdam, steel jacket box bottom concrete under water is critical process common in engineering construction.Mix at large-scale back cover During solidifying soil instillation process design, for ensureing that bottom concrete is not flush with water, bottom concrete surfacing, has once irrigated Becoming, to meet water sealing effect and stress needs, existing method is commonly used arranges center storing basin, lays a plurality of chute, arranges Many steel conduit pouring constructions.This construction method is big to the input of steel conduit, chute and center storing basin stand, and conduit lifts by crane Equipment is many, complicated organization, during construction, needs repeatedly setting-out, and technical risk is big, and difficulties in quality control is many；The most repeatedly mix Weak interlayer defect is easily formed between the cone heap contact surface that solidifying soil pressure water is formed.

Summary of the invention

It is an object of the invention to provide a kind of reduce cost, improve efficiency, ensure quality single catheter perfusion large-scale The construction method of bottom concrete under water.

The technical scheme realizing the object of the invention employing is as follows:

The construction method of single catheter perfusion Large Underwater bottom concrete that the present invention provides, comprises the following steps:

Step 1. starts setting-out by conduit by the underwater concreting technique initial position from cofferdam or one end of steel jacket box Perfusion bottom concrete, until this initial position bottom concrete reaches design height.

Step 2., after setting-out perfusion position bottom concrete reaches design thickness, is extracted conduit with crane gear, is being led The connection plugging hood of the base opening installation activity of pipe, then pumps a little bottom concrete with sky pump in the conduit install plugging hood Occlusion catheter, then with crane gear, this conduit moves to irrigate the reach at bottom concrete dilation angle edge and layout position, The conduit insertion that will be equipped with blocking concrete has irrigated in bottom concrete.

Step 3. will be equipped with the conduit of blocking concrete and inserts and irrigated after in bottom concrete, will envelope with crane gear Stifled cover is opened with the connection in conduit base opening, simultaneously with sky pump conductive pipe pumping bottom concrete, described under concrete pressure Plugging hood Automatic-falling.

Described plugging hood is hung out the water surface by step 4., continues through described conduit and constantly pumps bottom concrete until being somebody's turn to do Position bottom concrete of layouting reaches design height.

Step 5. extracts conduit after this position bottom concrete of layouting reaches design height again, reinstalls closure Cover, repeats step 2 to step 4, is layouted perfusion bottom concrete by the reach of repeatedly conduit, finally completes whole back cover coagulation Soil.

The concrete of occlusion catheter height in conduit described in the described step 2 substantially 1/2 back cover depth of water, described before The bottoming concrete thickness that waters moving position of layouting is more than 60cm.

Beneficial effect

The present invention is applicable to back cover area and relatively greatly and can complete to irrigate bottom concrete engineering within the bottom concrete presetting period. The repeatedly setting-out that untouched base concrete is poured by the inventive method is reduced to once, significantly reduces difficulty of construction, simultaneously Avoid bottom concrete to form weak interlayer, pour the adjustable controlled of height during furthermore achieved that bottom concrete, take During the conventional bottom concrete that disappeared construction, the temporary facility such as center storing basin, chute, is greatly decreased steel conduit, lifting appliance etc. and sets Execute.This process simplify conventional bottom closing construction process, reduce construction cost, great popularization.

Further illustrate technical scheme below in conjunction with the accompanying drawings.

Accompanying drawing explanation

Fig. 1 is the structural representation of constructing device of the present invention.

Fig. 2 to Fig. 7 is the schematic diagram of each step in construction method of the present invention.

Detailed description of the invention

Seeing Fig. 1, the constructing device 1 that the present invention uses, including setting the conduit 108 of latch fixed cover 104 and being connected in latch admittedly Surely the plugging hood 101 base opening of conduit 108 sealed on set 104, the tip 111 of plugging hood 101 is provided with the withdrawal of currency from circulation by hanger 110 Steel wire rope 109, plugging hood 101 is by hanger 102, wire-rope sling 103, movable latch 105 and described latch fixed cover 104 phase Connect, conduit 108 is additionally provided with the locating ring 106 movable latch 105 positioned, movable latch 105 connects steel wire of pulling pin Rope 107, steams again steel wire rope 109 and is connected with steel wire rope 107 of pulling pin.

See Fig. 1 Fig. 7, the construction method of single catheter perfusion Large Underwater bottom concrete that the present invention provides, adopt Use described constructing device, comprise the following steps:

When step 1. irrigates cofferdam (or steel jacket box) bottom concrete, set up simple rack 3 in one end, cofferdam 2 (angle), storage is installed Feed basin 4, is disposed with the steel conduit 108 of fixed funnel 8, with crane gear suspender and hoist cable 7 by funnel 8 together with steel conduit 108 1 Rising and sling, bottom concrete 9 is first delivered to storing basin 4 by the feed pipe 5 of sky pump, and storing basin 4 passes through chute 6 by bottom concrete 9 Pour into steel conduit 108 through funnel 8, fill the technique initial position from one end of cofferdam (or steel jacket box) 2 by underwater concrete water and open Beginning setting-out irrigates, until this initial position bottom concrete 9 reaches design height, as shown in Figure 2.

Step 2. is after setting-out perfusion position bottom concrete 9 reaches design thickness, with crane gear suspender and hoist cable 7 Extract steel conduit 108, the base opening of steel conduit 108 is installed plugging hood 101, then past through funnel 8 by feed pipe 5 with sky pump A little bottom concrete 9(steel conduit inner concrete height substantially 1/2 back cover is pumped in installing the steel conduit 108 of plugging hood 101 The depth of water) closure steel conduit 108, then move to irrigate bottom concrete dilation angle edge by this steel conduit 108 with crane gear Near reach layout position (requiring this position back cover more than thickness 60cm), the steel conduit 108 that will be equipped with bottom concrete is slow It is slowly inserted and irrigates in bottom concrete, as shown in Figure 3.

Installation plugging hood 101 steel conduit 108 equipped with concrete are inserted after irrigating bottom concrete by step 3., Then the latch 105 extracting on steel conduit 108 with another suspender (or little hook) by steel wire rope 107 of pulling pin described in pulling up, solves Except the constraint to wire-rope sling 103, irrigate bottom concrete 9 with sky pump to steel conduit 108 simultaneously, press at bottom concrete 9 Described plugging hood 101 Automatic-falling under power, as shown in Figure 4.

Step 4. continues up drawing pin steel wire rope 107 and drives withdrawal of currency from circulation steel wire rope 109 that described plugging hood 101 is hung out water Face, the past described steel conduit 108 that keeps constantly pumps bottom concrete 9, and until this is layouted, position bottom concrete 9 reaches to set Meter height, as shown in Figure 5.

Step 5. extracts steel conduit 108 after this position bottom concrete of layouting reaches design height again, reinstalls envelope Stifled cover 101, again pumps a little bottom concrete 9 occlusion catheter 108 with sky pump toward conduit 108, again will be equipped with back cover coagulation The steel conduit 108 of soil 9 slowly inserts and has irrigated in bottom concrete 9, and as shown in Figure 6, repetition step 2 is to step 4, by repeatedly Steel conduit 108 reach is layouted perfusion bottom concrete, finally completes whole bottom concrete, as shown in Figure 7.

Claims

1. a construction method for single catheter perfusion Large Underwater bottom concrete, comprises the following steps:

Step 1. starts setting-out by conduit by the underwater concreting technique initial position from cofferdam or one end of steel jacket box Perfusion bottom concrete, until this initial position bottom concrete reaches design height；

Step 2., after setting-out perfusion position bottom concrete reaches design thickness, extracts conduit with crane gear, at conduit The connection plugging hood of base opening installation activity, then pumps the closure of a little bottom concrete with sky pump in the conduit install plugging hood Conduit, then with crane gear, this conduit moves to irrigate the reach at bottom concrete dilation angle edge and layout position, will dress The conduit having blocking concrete inserts and has irrigated in bottom concrete；

Step 3. will be equipped with the conduit of blocking concrete and inserts and irrigated after in bottom concrete, with crane gear by plugging hood Open with the connection in conduit base opening, simultaneously with sky pump conductive pipe pumping bottom concrete, described closure under concrete pressure Cover Automatic-falling；

Described plugging hood is hung out the water surface by step 4., continues through the described conduit position that constantly pumps bottom concrete until this is layouted Put bottom concrete and reach design height；

Step 5. extracts conduit after this position bottom concrete of layouting reaches design height again, reinstalls plugging hood, weight Multiple step 2 to step 4, is layouted perfusion bottom concrete by the reach of repeatedly conduit, is finally completed whole bottom concrete.

Construction method the most according to claim 1, is characterized in that described in described step 2, the concrete of occlusion catheter is being led Height in the pipe substantially 1/2 back cover depth of water, the layout bottoming concrete thickness that waters of position of described reach is more than 60cm.