CN111237540A

CN111237540A - Drainage pipeline installation process

Info

Publication number: CN111237540A
Application number: CN202010045939.5A
Authority: CN
Inventors: 陈康水; 李国富; 梁党育
Original assignee: Guangdong Shicheng Building Decoration Engineering Co Ltd
Current assignee: Guangdong Shicheng Building Decoration Engineering Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-06-05

Abstract

The invention relates to a drainage pipeline installation process, which comprises the following steps: s1: excavating a plurality of layers of grooves, and arranging a transition platform between every two adjacent layers; s2: a water drainage pipe is connected in the groove; s3: inserting anchor rods into the length direction of the transition platform at intervals; s4: a pipe sleeve is sleeved outside the drain pipe; s5: and a steel rope is connected between the anchor rod and the pipe sleeve, and the connecting point of the steel rope and the anchor rod is higher than the connecting point of the steel rope and the drain pipe. Has the advantages that the pipeline is not easy to leak water and is not easy to be broken when the collapsible soil is settled.

Description

Drainage pipeline installation process

Technical Field

The invention relates to the technical field of pipeline engineering, in particular to a drainage pipeline installation process.

Background

The drainage pipeline installation process is a very mature technology in engineering construction.

In the prior art, a common drainage pipeline construction scheme is a pipeline open excavation scheme, when a pipeline is installed in collapsible soil, if water leaks from the pipeline, the lower part of the water leakage position of the pipeline sinks, which is commonly called uneven display. At this time, the pipeline may be pulled apart due to uneven stress.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a drainage pipeline installation process which has the advantages that the pipeline is not easy to leak water and is not easy to break when collapsible soil is settled.

The above object of the present invention is achieved by the following technical solutions:

a drainage pipeline installation process comprises the following steps:

s1: excavating a plurality of layers of grooves, and arranging a transition platform between every two adjacent layers; s2: a water drainage pipe is connected in the groove; s3: inserting anchor rods into the length direction of the transition platform at intervals; s4: a pipe sleeve is sleeved outside the drain pipe; s5: and a steel rope is connected between the anchor rod and the pipe sleeve, and the connecting point of the steel rope and the anchor rod is higher than the connecting point of the steel rope and the drain pipe.

Through adopting above-mentioned technical scheme, fix the steel cable at stock one end and pull the drain pipe, even the collapsible soil of slot bottom takes place to subside, also can alleviate the atress of drain pipe uneven, prevent that the drain pipe from drawing to split.

Furthermore, flat seams are arranged among the drain pipes.

By adopting the technical scheme, the flat seam enables the seam between the drain pipes to be smooth, and the pipe sleeve is convenient to sleeve.

Further, the pipe sleeve is sleeved at the joint of the adjacent drain pipes.

By adopting the technical scheme, the pipe sleeve can provide tension and play a role in sealing the joint of the drainage pipes at the joint of the drainage pipes so as to prevent water leakage at the joint between the drainage pipes.

Further, the following steps are also included between the step S1 and the step S2: and laying a sand cushion layer at the bottom of the groove.

Through adopting above-mentioned technical scheme, set up the sand cushion and can improve ground bearing capacity, reduce the settlement volume and accelerate the drainage consolidation effect of weak soil layer.

Further, the width of the transition platform: when the slope is set to be opened and the groove is opened, the distance between the slope and the groove should not be less than 0.8m, when the groove is straight, the distance between the slope and the groove should not be less than 0.5m, and when the well point equipment is installed, the distance between the slope and the groove should not be less than 1.5 m.

By adopting the above technical solution, the transition platform is mainly used for personnel operation, and therefore, a minimum width limitation is required.

Furthermore, undisturbed foundation soil at the bottom of the groove can not be disturbed, a soil layer of 200-300 mm is reserved at the bottom of the groove during mechanical excavation, and the groove is excavated to a designed elevation manually and leveled.

By adopting the technical scheme, if mechanical excavation is carried out to the elevation, the soil below the design height is disturbed due to the fact that personnel operate the hook shovel inaccurately, and therefore in order to avoid repairing the disturbed soil body, the steps are adopted.

Further, when foundation soil is disturbed due to poor drainage, the disturbance depth is within 100mm, and natural graded gravel or gravel is filled for treatment; the disturbance depth is within 300mm, but when the lower part is hard, the gravel or the rock block is filled, and the gap is filled with the gravel to level the surface.

By adopting the technical scheme, the standard processing mode of trench and foundation pit excavation is adopted.

Furthermore, a first hanging lug is arranged on the pipe sleeve, a second hanging lug is arranged on the anchor rod, and two ends of the steel cable are respectively connected with the first hanging lug and the second hanging lug.

By adopting the technical scheme, the first suspension loop and the second suspension loop provide connection points for the steel cable.

Further, after the step S5, a tightness test is carried out, all openings of the test pipe section should be closed, and a leakage phenomenon cannot occur; the test pipe section can not use a gate valve as a blocking plate and can not contain a fire hydrant, a water hammer eliminator and a safety valve; impurities in the pipeline are removed before the hydraulic pressure experiment; and water source leading and draining are well carried out.

Through adopting above-mentioned technical scheme, the leakproofness test is used for detecting the leakproofness of drain pipe.

In summary, the invention includes at least one of the following beneficial technical effects:

the steel rope pulls the drain pipe, so that when the collapsible soil at the bottom of the drain pipe is settled, the phenomenon of uneven stress is relieved, and the drain pipe is prevented from being broken;

the pipe sleeve is sleeved at the joint between the drainage pipes, so that water leakage at the joint can be effectively reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention.

In the figure, 1, a groove; 2. a transition platform; 3. a drain pipe; 4. an anchor rod; 5. pipe sleeve; 6. a steel rope; 7. a sand cushion layer; 8. a first suspension loop; 9. and a second suspension loop.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the drainage pipeline installation process disclosed by the invention comprises the following steps:

s1: a plurality of layers of grooves 1 are excavated, and transition platforms 2 are arranged between two adjacent layers.

In an embodiment of the invention, the width of the transition platform 2: when the slope is set to be opened and the groove is opened, the distance between the slope and the groove should not be less than 0.8m, when the groove is straight, the distance between the slope and the groove should not be less than 0.5m, and when the well point equipment is installed, the distance between the slope and the groove should not be less than 1.5 m. To bring the anchor rods 4 closer to the drain pipe 3 in the channel 1, straight-grooved grooving is used. Transition platform 2 supplies the personnel to operate, need place the emergency ladder on the slope, supplies the personnel climbing. Undisturbed foundation soil at the bottom of the groove 1 cannot be disturbed, a 200-300 mm soil layer is reserved at the bottom of the groove during mechanical excavation, and the groove is excavated to a designed elevation manually and leveled. If mechanical excavation is adopted to reach the elevation, the soil below the design height is disturbed due to the fact that personnel operate the hook shovel inaccurately, and therefore in order to avoid repairing the disturbed soil body, the steps are adopted. When the local over excavation or disturbance occurs at the bottom of the groove and the over excavation depth is not more than 150mm, the groove can be backfilled and tamped by original soil of the excavation groove, and the compaction degree of the groove is not lower than that of original foundation soil; the water content of the soil at the bottom of the foundation is large, so that the soil is not suitable for compaction, and effective measures such as replacement and filling are required. When foundation soil is disturbed due to poor drainage, the disturbance depth is within 100mm, and natural graded sand or gravel is filled for treatment; the disturbance depth is within 300mm, but when the lower part is hard, the gravel or the rock block is filled, and the gap is filled with the gravel to level the surface. The steps are standard processing methods for processing foundation soil disturbance caused by poor drainage. In order to improve the bearing capacity of the foundation, reduce the settlement and accelerate the drainage consolidation of a weak soil layer, a sand cushion layer 7 is laid at the bottom of the groove 1.

S2: a drain pipe 3 is connected to the groove 1.

In the embodiment of the present invention, the method for inserting the water pipe includes a flat seam and a socket seam, and in order to sleeve the pipe sleeve 5 at the seam of the drain pipe 3, a flat seam is adopted. The pipe sleeve 5 is sleeved at the joint of the drain pipe 3, and the pipe sleeve 5 plays a role in sealing the joint while supporting the drain pipe 3 under the traction of the steel cable 6, so that the possibility of water leakage at the joint is reduced.

S3: and anchor rods 4 are inserted into the transition platform 2 at intervals in the length direction.

Thereby, the water discharge pipe 3 is subjected to the traction force of the steel rope 6 connected with the anchor rod 4 in a subsection, and the whole section of the water discharge pipe 3 is ensured to be subjected to the traction force. When the rock formation is located at a position not deep underground, the anchor 4 is inserted into the rock formation from the earth layer to improve the stability of the anchor 4.

S4: a pipe sleeve 5 is sleeved outside the drain pipe 3;

in the embodiment of the present invention, pipe sleeve 5 is sleeved at the joint of drain pipe 3, and the advantages of pipe sleeve 5 sleeved at the joint of drain pipe 3 have been specifically described above.

S5: a steel cable 6 is connected between the anchor rod 4 and the pipe sleeve 5, and the connecting point of the steel cable 6 and the anchor rod 4 is higher than the connecting point of the steel cable 6 and the drain pipe 3.

In the embodiment of the invention, the pipe sleeve 5 and the anchor rod 4 are both made of steel structures, the first hanging lug 8 is welded on the pipe sleeve 5, and the second hanging lug 9 is welded on the anchor rod 4. The first hanging lugs 8 are positioned on two sides of the upper end of the pipe sleeve 5. The connection mode of the steel rope 6 and the first hanging lug 8 and the second hanging lug 9 is as follows: the two ends of the steel rope 6 respectively penetrate through the first hanging lug 8 and the second hanging lug 9, then the two ends are respectively knotted, and the two ends of the steel rope 6 are respectively firmly connected with the first hanging lug 8 and the second hanging lug 9 in an electric welding mode.

Sewage, rain sewage river pipelines and rainwater pipelines in collapsible soil, expansive soil and quicksand areas can be put into operation after being qualified through a tightness test. The tightness test of the pipeline is divided into a water-closing test and a gas-closing test, and the tightness test is determined according to the design requirement; when the design has no requirement, a water closing test or a gas closing test is selected according to the actual situation.

In the embodiment of the invention, before the trench 1 is backfilled, a tightness test is carried out, all openings of a test pipe section are closed, and a leakage phenomenon cannot occur; the test pipe section can not use a gate valve as a blocking plate and can not contain a fire hydrant, a water hammer eliminator and a safety valve; impurities in the pipeline are removed before the hydraulic pressure experiment; and water source leading and draining are well carried out.

Preparation work of a non-pressure pipeline water-closing test:

(1) the appearance quality of the pipeline and the inspection well is accepted;

(2) the pipeline is not backfilled and no water is accumulated in the groove 1;

(3) all the preformed holes are blocked, so that water cannot seep;

(4) the bearing capacity of the blocking plates at two ends of the pipeline is calculated to be larger than the resultant force of water pressure; the water outlet pipe is externally provided with a reserved water inlet pipe and a reserved water outlet pipe, and the water inlet pipe and the water outlet pipe are firmly plugged and cannot be seeped;

(5) pipe-jacking construction, wherein grouting holes are plugged, pipe orifices are treated according to design requirements, and underground water is below the pipe;

(6) schemes such as water source leading and connecting, drainage dredging and the like are well made.

The implementation principle of the embodiment is as follows: through setting up steel rope 6 and stock 4, provide traction force for drain pipe 3 to when the local settlement takes place in drain pipe 3 bottom, drain pipe 3 still can not produce the uneven condition of serious atress, thereby reduces drain pipe 3 because of the uneven condition that draws and split of atress.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A drainage pipeline installation process is characterized by comprising the following steps:

s1: excavating a plurality of layers of grooves (1), and arranging transition platforms (2) between two adjacent layers;

s2: a drainage pipe (3) is connected in the groove (1);

s3: inserting anchor rods (4) into the length direction of the transition platform (2) at intervals;

s4: a pipe sleeve (5) is sleeved outside the drain pipe (3);

s5: a steel rope (6) is connected between the anchor rod (4) and the pipe sleeve (5), and the connecting point of the steel rope (6) and the anchor rod (4) is higher than the connecting point of the steel rope (6) and the drain pipe (3).

2. Drainpipe installation process according to claim 1, characterised in that between the drainpipes (3) there is a plain seam.

3. A drainpipe installation process according to claim 2, wherein the pipe sleeve (5) is sleeved at the connection of adjacent drainpipes (3).

4. The drainpipe installation process of claim 1, further comprising the following steps between the steps S1 and S2: and a sand cushion layer (7) is paved at the bottom of the groove (1).

5. Drainline installation process according to claim 1, characterised in that the width of the transition platform (2): when the slope is set to be opened and the groove is opened, the distance between the slope and the groove should not be less than 0.8m, when the groove is straight, the distance between the slope and the groove should not be less than 0.5m, and when the well point equipment is installed, the distance between the slope and the groove should not be less than 1.5 m.

6. The drainage pipeline installation process of claim 1, wherein undisturbed foundation soil is not disturbed at the bottom of the trench (1), a soil layer of 200-300 mm is reserved at the bottom of the trench during mechanical excavation, and the trench is excavated to a designed height and leveled manually.

7. The drainage pipeline installation process of claim 1, wherein when the foundation soil is disturbed due to poor drainage, the disturbance depth is within 100mm, and natural graded sand and stone or gravel are filled; the disturbance depth is within 300mm, but when the lower part is hard, the gravel or the rock block is filled, and the gap is filled with the gravel to level the surface.

8. The drainage pipeline installation process according to claim 1, wherein the pipe sleeve (5) is provided with a first hanging lug (8), the anchor rod (4) is provided with a second hanging lug (9), and two ends of the steel rope (6) are respectively connected with the first hanging lug (8) and the second hanging lug (9).

9. The drainpipe installation process of claim 1, wherein after step S5, a tightness test is performed, and all openings of the test pipe section should be closed without leakage; the test pipe section can not use a gate valve as a blocking plate and can not contain a fire hydrant, a water hammer eliminator and a safety valve; impurities in the pipeline are removed before the hydraulic pressure experiment; and water source leading and draining are well carried out.