CN206157860U

CN206157860U - Drainage pipeline

Info

Publication number: CN206157860U
Application number: CN201620937683.8U
Authority: CN
Inventors: 郭延义; 李斌; 王维江
Original assignee: Shanghai Construction No 2 Group Co Ltd
Current assignee: Shanghai Construction No 2 Group Co Ltd
Priority date: 2016-08-25
Filing date: 2016-08-25
Publication date: 2017-05-10
Anticipated expiration: 2026-08-25

Abstract

The utility model discloses a drainage pipeline, include: bury concrete duct underground and set up bushing pipe in the inside multisection of this concrete duct, wherein, weld between the bushing pipe in adjacent two sections, just interior bushing pipe with space between the cement pipe is passed through the grout and is filled. The utility model discloses a pipe -in -pipe structure need not excavation construction, and the part occupies traffic route (working pit), reduces the influence to road traffic, need not the foundation ditch construction, does not have the risk that the foundation ditch collapses, not having enclosure system, need not a cubic metre of earth excavation, economic cost reduces, the process is simple, and construction period significantly reduces.

Description

A kind of drainage pipeline

Technical field

The utility model is related to the realm of building construction, more particularly to a kind of drainage pipeline.

Background technology

With the continuous expansion in city, the old pipeline in original city is of the remote past, faces situation about scrapping, and city vehicle Increase, make path resource more nervous.

In the case that conventional pipelines construction is disconnected in the road or half range interrupts, retaining design of constructing in advance, Ran Houjin Row earth excavation (supporting pit retaining monitoring), abolishes old pipeline, and again pre-buried new pipeline, finally backfills, and recovers road surface.Fender body It is various informative, can is bored concrete pile, (new type cement soil churned pile wall) stake of SMW engineering methods or steel sheet pile form, according to digging depth, Select several horizontal support.This kind of method drawback is a lot, and one is to have had a strong impact on traffic, makes originally nervous path resource more It is narrow；Two is to need to carry out excavation of foundation pit, there is certain foundation pit collapse risk；Three is that retaining design is constructed, cuts the earth and returned The quantities such as earth fill, way recovery are great, cost increase, the wasting of resources；Four is that operation is various, and construction period is longer.

Utility model content

The utility model provides a kind of drainage pipeline, to solve above-mentioned technical problem present in prior art.

To solve above-mentioned technical problem, the utility model provides a kind of drainage pipeline, including：It is embedded in the concrete of underground Pipeline and the more piece internal lining pipe being arranged on inside the concrete duct, wherein, weld between two adjacent sections internal lining pipe, and institute Filled by cement mortar in the space stated between internal lining pipe and the pipe of cement.

Preferably, two adjacent sections internal lining pipe is by seam crossing outsourcing hot melt strip sweat soldering.

Preferably, positioned at the concrete duct end space by being blocked by cement mortar after the filling of many spunyarns.

Preferably, the bottom level of the concrete duct has inserted two reinforcing bars.

Preferably, the internal lining pipe is managed using HDPE.

Preferably, the end of the internal lining pipe offers in advance the installing hole for being connected with draw-gear.

Compared with prior art, the utility model has advantages below：

1. tube-in-tube structure is adopted, and without the need for excavation construction, local takes traffic route (working pit), reduces to road traffic Impact；

2. without the need for foundation pit construction, the risk without foundation pit collapse；

3. without retaining design, without the need for earth excavation, financial cost is reduced；

4. operation is simple, greatly reduces the construction period.

Description of the drawings

Fig. 1 is the structural representation of pipeline in the specific embodiment of the utility model one；

Fig. 2 is the side view of pipeline in the specific embodiment of the utility model one；

Fig. 3 is pipeline construction schematic diagram in the specific embodiment of the utility model one.

Specific embodiment

It is understandable to enable above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with the accompanying drawings to this The specific embodiment of utility model is described in detail.It should be noted that, the utility model accompanying drawing is in the form of simplification And non-accurately ratio is used, only to purpose that is convenient, lucidly aiding in illustrating the utility model embodiment.

As shown in Figure 1 to Figure 3, the utility model provides a kind of pipeline construction method, in original concrete duct 1 Carry out when structural strength sustains damage, specifically include following steps：

Step 1：Whole piece pipe-line to be onstructed is divided into into multiple active sections, and a job is excavated in each active section Hole, spills the part of original concrete duct 1.Specifically, in order to effectively coordinate the installation of internal lining pipe 3, therefore working pit is opened Digging point should select according to overall pipe condition, and excavation face facilitates upper and lower tubing and installation personnel, and in being located at same caliber section partially Between position, generally, when the size of working pit is 2.2m*5m, just can realize the construction of internal lining pipe 3.

Preferably, during working pit is excavated, if finding the breakage of original concrete duct 1, seepage, to breakage The outer wall of concrete duct 1 carry out compaction grouting, it is ensured that the sealing of concrete duct 1, after carrying out again after injection stability Continuous construction.

Step 2：It is put into internal lining pipe 3 section by section in described concrete duct 1, and by the thermofussion welding of two adjacent sections internal lining pipe 3 Connect.

Preferably, the step 2 is specifically included：

Step 21：The internal lining pipe 3 of first segment is hung in working pit with loop wheel machine, in the bottom water horizontal of concrete duct 1 Enter two reinforcing bars as the support of the internal lining pipe 3.Generally internal lining pipe 3 is that 2 meters long one HDPE (high density polyethylene (HDPE)) for saving are short Pipe；

Step 22：The first segment internal lining pipe 3 is pushed in concrete duct 1 and part spills, and typically half is located at coagulation In native pipeline 1, half spills；

Step 23：Next section internal lining pipe 3 is hung in, sweat soldering after making the section internal lining pipe 3 dock with previous section internal lining pipe 3；

Step 24：The internal lining pipe 3 of welding is drawn in concrete duct 1 using draw-gear 8, and makes final section liner The part of pipe 3 spills；Specifically, installing hole is got out on the inner tube wall of first segment internal lining pipe 3, steel wire is penetrated in installing hole Rope, the draw-gear 8 being put in under in opposite side inspection shaft is connected.It is to be welded finish after, in the presence of tractive force, will Internal lining pipe 3 is drawn in concrete duct 1 by certain speed.

Step 25：Repeat step 23-24, until internal lining pipe 3 is fully entered in the concrete duct 1.

Step 3：Space between internal lining pipe and concrete duct carries out mortar depositing construction；Preferably, the step 3 is wrapped Include：

Step 31：After internal lining pipe 3 is all advanced in the concrete duct 1, in concrete duct 1 and the shape of internal lining pipe 3 Into space two ends blocked with brick, and reserved injected hole and slurry outlet, the injected hole is located at the upstream region of internal lining pipe 3, institute Slurry outlet is stated positioned at downstream area, and the slurry outlet is separately positioned on the top of internal lining pipe, at 3/4,1/2, is referred to as top Stomidium 6,3/4 hole 4 and 1/2 hole 5；

Step 32：Slip casting is carried out to the space between concrete duct 1 and internal lining pipe 3 by injected hole, and utilizes pulp Hole observes pulp situation and discharges air；Specifically, in injected hole interpolation 20mm Grouting Pipe, by Grouting Pipe to space slip casting, When cement mortar 2 is flowed out in 1/2 hole 5, stop first time slip casting, block 1/2 hole 5, the cement mortar 2 for treating the first injection sinks in gap Form sediment and condense, this reduces the buoyancy to internal lining pipe 3, and can exclude in second follow-up slip casting it is unnecessary in space Moisture；Start second slip casting after certain interval of time, when cement mortar 2 is flowed out in 3/4 hole 4, stop second slip casting, closure 3/4 hole 4, the cement mortar 2 for treating second injection precipitates condensation in gap；Last time slip casting is carried out, top to be located at is waited When topped hole 6 flows out cement mortar 2, closure is located at topped hole 6.

Step 33：Then, some spunyarns are wound on the end of internal lining pipe 3, and with iron hair clasp and hammer by spunyarn pound into In space between concrete duct 1 and internal lining pipe 3, cement mortar is smeared in outside.

Step 4：Backfilling working is cheated.Specifically, 1) for the working pit for possessing backfill condition is backfilled as early as possible.2) return Before filling out earthing, first working pit bottom is removed clean, it is ensured that without ponding in working pit.3) backfill should it is uniform, symmetrical, be layered into OK, backfill is using sand or clay, compaction in layers backfill.4) to be backfilling into when working pit is backfilled at support bottom 300mm, The dismounting that will can be supported.

It should be noted that the utility model is before slip casting is carried out, hydraulic pressure is first added into the internal lining pipe 3 of construction section 0.2Mpa, prevents the internal lining pipe 3 during slip casting from subsiding because of external force impact.

Further, the cement mortar 2 in the utility model adopts cement：Water：Flyash：Bath of glass=1:0.6:0.85: 0.01, it is ensured that cement mortar 2 keeps fluid state, flows naturally during slip casting.Preferably, the grouting pressure choosing of cement mortar 2 Select 0.2Mpa, it is ensured that the continuity into slurry is kept during slip casting.

It should be noted that when grout absorption is very big, when lengthy pressure is not raised, needing to check downstream closure and adjustment water The concentration and match ratio of mud 2, to shorten setting time, carries out little pump amount, low-pressure slip casting, so that slurries are in the crack of upper strata There is the time of relative retention, be easy to gel.Can certainly batch (-type) slip casting, but stop the note time no more than slurries gel when Between.

With continued reference to Fig. 1 to Fig. 3, the utility model also provides a kind of pipeline, is formed using above-mentioned pipeline construction method, Including：The concrete duct 1 of underground, the more piece internal lining pipe 3 inside concrete duct 1 are embedded in, wherein, per two section liners By there is space, and the space between sweat soldering, and the internal lining pipe 3 and the concrete duct 1 by water between pipe 3 Mud 2 is filled.

Obviously, those skilled in the art can carry out various changes to utility model and modification is new without deviating from this practicality The spirit and scope of type.So, if it is of the present utility model these modification and modification belong to the utility model claim and its Within the scope of equivalent technologies, then the utility model is also intended to including including these changes and modification.

Claims

1. a kind of drainage pipeline, it is characterised in that include：It is embedded in the concrete duct of underground and is arranged on the concrete More piece internal lining pipe inside pipeline, wherein, weld between two adjacent sections internal lining pipe, and the internal lining pipe and the concrete duct Between space by cement mortar fill.

2. drainage pipeline as claimed in claim 1, it is characterised in that two adjacent sections internal lining pipe is by seam crossing outsourcing hot melt Band sweat soldering.

3. drainage pipeline as claimed in claim 1, it is characterised in that the space positioned at the concrete duct end is by many Blocked by cement mortar after spunyarn filling.

4. drainage pipeline as claimed in claim 1, it is characterised in that the bottom level of the concrete duct has inserted two Reinforcing bar.

5. drainage pipeline as claimed in claim 1, it is characterised in that the internal lining pipe is managed using HDPE.

6. drainage pipeline as claimed in claim 1, it is characterised in that the end of the internal lining pipe offer in advance for traction The installing hole of device connection.