CN111173991B

CN111173991B - Municipal road pipeline construction method

Info

Publication number: CN111173991B
Application number: CN202010092780.2A
Authority: CN
Inventors: 曹君
Original assignee: Guangdong Jun Trillion Construction Group Co ltd
Current assignee: Guangdong Jun Trillion Construction Group Co ltd
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2021-07-02
Anticipated expiration: 2040-02-14
Also published as: CN111173991A

Abstract

The invention relates to the field of municipal pipeline construction, in particular to a municipal road pipeline construction method, which comprises the following steps: s1, digging a groove; s2, leveling the bottom of the groove; s3, placing a pipeline seat; s4, hoisting the pipeline unit; s5, coating cement mortar on the outer wall of the joint of the adjacent pipeline units; s6, filling broken stones into the grooves after the concrete connecting pipes are cured; s7, injecting slurry towards the groove until the surface of the slurry is higher than the broken stone; s8, adopting a waterproof material to completely cover the top of the groove and then standing for at least 3 d; s9, backfilling soil into the groove to a soil layer height higher than the original pavement; s10, compacting the backfilled soil to form a road soil layer; s11, adjusting the height of a road soil layer to meet the design requirement of the road; s12, paving a road. The invention has the effects that the municipal road pipeline is not easy to be bent and broken due to local stress, the structure is stable, leakage is not easy to occur, and the quality of the road surface, the municipal road and the municipal road pipeline is stably supported.

Description

Municipal road pipeline construction method

Technical Field

The invention relates to the technical field of municipal pipeline construction, in particular to a municipal road pipeline construction method.

Background

The town road pipeline is just along the town road trend buries the town pipeline of burying in the town road below, and the town road pipeline mainly can be used to transport fluid or installation wire and cable at present.

The existing municipal road pipeline is usually prepared by digging a groove on the road surface, installing a plurality of pipeline seats in the groove, leaving a certain distance between adjacent pipeline seats, hoisting the pipeline to the pipeline seat in the groove for installation, backfilling soil for compaction after the pipeline is installed, and then repairing the road surface.

The above prior art solutions have the following drawbacks: however, because the pipe seat has been placed in the ditch inslot for pipeline and ditch groove bottom leave the space, owing to need occupy the town road during the construction moreover, for avoiding influencing the traffic, the ditch groove width of excavating usually can be comparatively close in order to reduce the too wide condition that leads to occupying the too much traffic of ditch groove excavation with buried pipeline diameter, thereby has leaded to pipeline and ditch groove lateral wall and diapire to leave the interval but the interval is not big.

When soil is backfilled, the soil has viscosity and poor fluidity, more soil on the surface layer can be compacted through the compaction of a road roller, particularly, the soil below the axis of a pipeline is likely to have more gaps, the pipeline is buried below the road, finally, the road needs to be repaired above the pipeline, the weight of a vehicle and the impact caused by the driving of the vehicle need to be borne, the acting force borne by the road is transmitted to the pipeline due to the fact that the pipeline is located below the road, and the soil near the pipeline is not dense enough, so that the soil does not have enough supporting force as a reaction force to support the pipeline, the pipeline is likely to have large local stress and bend, particularly, the connection of adjacent pipeline units is a weak point of the pipeline, the pipeline is likely to break at the connection of the adjacent pipeline units and leak, and even the road surface is recessed, there is room for improvement.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a municipal road pipeline construction method which has the effect of stabilizing the municipal road pipeline structure.

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

a municipal road pipeline construction method comprises the following steps:

s1, excavating a road to form a groove;

s2, leveling the bottom of the groove;

s3, placing a pipeline seat at the bottom of the groove;

s4, hoisting pipeline units in sequence;

s5, coating cement mortar on the outer wall of the joint of the adjacent pipeline units, and forming a concrete connecting pipe covering the gap between the adjacent pipeline units after the cement mortar is cured;

s6, filling broken stones into the grooves after the concrete connecting pipes are cured;

s7, injecting slurry towards the groove until the surface of the slurry is higher than the broken stone;

s8, adopting a waterproof material to completely cover the top of the groove and then standing for at least 3 d;

s9, backfilling soil into the groove to a soil layer height higher than the original pavement;

s10, compacting the backfilled soil to form a road soil layer;

s11, adjusting the height of a road soil layer to meet the design requirement of the road;

s12, paving a road.

By adopting the technical scheme, broken stones are filled in the groove through the step S6, then slurry is injected towards the groove through the step S7, the broken stones are utilized to provide strong bearing capacity, the slurry is enabled to permeate gaps of the broken stones through the fluidity of the slurry, after the top of the groove is completely covered by waterproof materials and is kept still for at least 3d through the step S8, the water in the slurry is lost, the fluidity of soil is reduced to stably combine with the broken stones to form a broken stone soil mixture, the flowing of the broken stones is limited by the soil, the broken stones are stably supported, particularly, after the soil is backfilled through the step S9 and the backfilled soil is compacted through the step S10, the broken stones are further compacted, the broken stones are stably filled in the groove, the stable supporting force can be improved without being completely compacted through the rigidity characteristic of the broken stones, and the effect of the broken stone supporting pipeline wrapped by the soil is good and stable, the supporting force for the pipeline is uniformly distributed, so that the pipeline is not easy to bend and break due to local stress, the pipeline structure is stable, leakage is not easy to occur, the pavement is stably supported, the pavement is not easy to dent, and the quality of the municipal road and the municipal road pipeline is better;

the outer walls of the junctions of the adjacent pipe units are coated with cement mortar to form the concrete connection pipe through step S5, which further enhances the stability of the junctions of the adjacent pipes, makes the pipe structure more stable and less prone to leakage due to breakage at the junctions of the adjacent pipes.

The present invention in a preferred example may be further configured to: and in the step S6, the crushed stone is backfilled to the height range of +/-20 mm of the height of the crushed stone relative to the axis of the pipeline.

Through adopting above-mentioned technical scheme, fill in the volume through the height of injecing the rubble and backfilling with control rubble, avoid the rubble to fill too much and lead to the cost to increase in a large number, also reduced the rubble and filled too little and lead to the condition of unable stable support pipeline, effective control cost when getting better support pipeline in order to improve pipeline structure stable's effect.

The present invention in a preferred example may be further configured to: the particle size of the crushed stone filled in the groove in the step S6 is 8-12 mm.

Through adopting above-mentioned technical scheme, through the particle diameter of control rubble for leave enough clearance between rubble and the rubble and let the mud infiltration, avoid the too big rubble particle diameter to lead to the rubble to be difficult to fill in the space between pipeline and slot lateral wall or the diapire simultaneously, guarantee the effect of the filled effect of rubble and guarantee the effect of mud parcel rubble simultaneously.

The present invention in a preferred example may be further configured to: the mass ratio of water to soil of the slurry injected toward the trench in the step S7 is 1: 0.5-0.8.

By adopting the technical scheme, the proportion of water and soil is controlled, so that the slurry has enough fluidity to deeply penetrate into the broken stones to wrap the broken stones, and meanwhile, the situation that the effect of bonding the broken stones by the soil is poor due to less soil left after the water loss caused by excessive water in the slurry is reduced

The present invention in a preferred example may be further configured to: and in the step S7, slurry is injected towards the groove until the slurry level is 25-30mm higher than the pipeline axis.

Through adopting above-mentioned technical scheme, through control mud liquid level height, guarantee sufficient mud for after the moisture loss in the mud, have sufficient soil parcel rubble, make the effect of soil restriction rubble better, reduce the too much slower condition that leads to the moisture loss of mud simultaneously.

The present invention in a preferred example may be further configured to: the cement mortar coated on the outer wall of the joint of the adjacent pipeline units in the step S5 comprises the following components in parts by mass:

100 parts of Portland cement;

250 portions and 300 portions of fine aggregate;

50-80 parts of zircon powder;

30-60 parts of fluorite powder;

80-100 parts of granite powder;

10-15 parts of carborundum;

2-3 parts of a concrete thickener;

and 90-110 parts of water.

By adopting the technical scheme, zircon powder, fluorite powder and granite powder are added into cement mortar, so that the compressive strength of the solidified cement mortar is higher, and the prepared concrete connecting pipe has a stable structure, so that the joint of adjacent pipeline units is less prone to fracture;

by adding the emery into the cement mortar, the prepared concrete connecting pipe has better wear resistance and is not easy to damage;

the concrete thickener is added into the cement mortar, so that the cement mortar is thick and is not easy to flow after being coated on the outer wall of the pipeline unit, and the stable state is easy to keep and the concrete connecting pipe is formed by curing.

The present invention in a preferred example may be further configured to: the cement mortar also comprises the following components in parts by mass:

5-8 parts of glass fiber;

3-5 parts of carbon fiber.

Through adopting above-mentioned technical scheme, through adding glass fiber and carbon fiber in cement mortar for cement mortar solidification back anti fracture ability is stronger, makes the difficult fracture of concrete connection pipe that the preparation obtained, stable in structure, thereby connect adjacent pipeline unit steadily, makes the difficult fracture of town road pipeline stable in structure.

2-4 parts of 8-pentadecanone;

1-2 parts of triphenylsilane.

By adopting the technical scheme, the 8-pentadecanone and the triphenylsilane are added into the cement mortar and are matched in a specific proportion, so that the impermeability of the cured cement mortar is stronger, the prepared concrete connecting pipe has better impermeability and leakage resistance, the leakage between adjacent pipeline units is not easy to occur, and the leakage of municipal road pipelines is reduced.

0.4-0.7 part of acridone.

By adopting the technical scheme, the acridone, the 8-pentadecanone and the triphenylsilane are added into the cement mortar for matching, so that the impermeability and the leakage resistance of the concrete connecting pipe are better, and the leakage of the municipal road pipeline is further reduced.

The present invention in a preferred example may be further configured to: the preparation method of the cement mortar comprises the following steps:

s01, mixing portland cement, water and a concrete thickener, and uniformly stirring to form a first premix;

s02, adding zircon powder, fluorite powder, granite powder and carborundum into the first premix, and uniformly stirring to form a second premix;

and S03, adding fine aggregates into the second premix, and uniformly stirring to form cement mortar.

By adopting the technical scheme, fine aggregate is added at last, so that the other raw materials are uniformly dispersed, the performance difference of the cement mortar is small, and the quality of the cement mortar is good.

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

1. the mud is utilized to wrap the broken stones so as to limit movement of the broken stones and stably support the municipal road pipeline, so that the municipal road pipeline is not easy to bend and break due to local stress, the pipeline structure is stable, leakage is not easy to occur, the road surface is stably supported, the road surface is not easy to dent, and the quality of the municipal road and the municipal road pipeline is better;

2. the connection stability of adjacent pipelines is further enhanced through the concrete connecting pipe, so that the pipeline structure is more stable, and the adjacent pipelines are less prone to fracture and leakage at the connection position;

3. through adding zircon powder, fluorite powder and granite stone powder in cement mortar for compressive strength after cement mortar solidification is higher, and the concrete connection pipe stable in structure who prepares the gained makes adjacent pipeline unit junction more difficult fracture.

Drawings

FIG. 1 is a schematic flow diagram of a process for constructing a municipal pipeline according to the invention.

Detailed Description

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

The information on the source of the raw materials used in the following examples and comparative examples is shown in Table 1

TABLE 1

Examples 1 to 4

The cement mortar comprises the following raw materials:

portland cement, fine aggregates, zircon powder, fluorite powder, granite powder, carborundum, a concrete thickener and water.

The amounts (in Kg) of the raw materials charged in the examples are specified in Table 2:

TABLE 2

Raw materials	Example 1	Example 2	Example 3	Example 4
					Portland cement	100	100	100	100
Fine aggregate	250	275	300	280
					Zircon powder	50	65	80	70
Fluorite powder	30	45	60	40
					Granite powder	80	90	100	88
Carborundum emery	10	12.5	15	11
					Concrete thickener	2	2.5	3	2.2
Water (W)	90	100	110	100

The preparation method of the cement mortars of examples 1 to 4 includes the following steps:

s01, adding portland cement, water and a concrete thickener into a stirring kettle, stirring at the rotating speed of 80r/min for 5min to form a first premix;

s02, adding zircon powder, fluorite powder, granite powder and carborundum into the first premix, stirring for 3min at a rotating speed of 80r/min to form a second premix;

and S03, adding the fine aggregate into the second premix, stirring at the rotating speed of 45r/min for 10min to form cement mortar.

Examples 5 to 8

A cement mortar, which differs from example 4 only in that:

in step S02, glass fiber and carbon fiber were added, and the amounts (in Kg) of the raw materials in each example are shown in table 3:

TABLE 3

Raw materials	Example 5	Example 6	Example 7	Example 8
					Glass fiber	5	6.5	8	7
Carbon fiber	3	4	5	4.5

Examples 9 to 16

A cement mortar, which differs from example 4 only in that:

in step S02, two or three of 8-pentadecanone, triphenylsilane and acridone are also added, and the input amount (unit Kg) of each raw material in each example is detailed in Table 4:

TABLE 4

Examples 17 to 20

A cement mortar, which differs from example 4 only in that:

in step S02, glass fiber, carbon fiber, 8-pentadecanone, triphenylsilane, acridone were added, and the amounts (in Kg) of the raw materials in each example are shown in Table 5:

TABLE 5

Raw materials	Example 17	Example 18	Example 19	Example 20
					Glass fiber	5	6.5	8	7
Carbon fiber	3	4	5	4.5
					8-pentadecanone	2	3	4	2.2
Triphenylsilanes	1	1.5	2	1.3
					Acridone derivatives	0.4	0.5	0.7	0.6

Example 21

Referring to fig. 1, the invention discloses a municipal road pipeline construction method, which comprises the following specific steps:

s1, excavating a road to form a groove, which comprises the following specific steps:

performing segmented construction according to a construction drawing, when a current engineering segment is constructed, firstly shielding a road according to the width of the pipeline and the designed installation position of the pipeline, entering the field of equipment, and then excavating the road to form a groove, wherein the width of the groove is 120% of the diameter of the pipeline, and the depth of the groove is determined according to the embedding depth of the pipeline design and the height of a pipeline seat;

s2, leveling the bottom of the groove, which specifically comprises the following steps:

compacting and flattening the bottom of the groove, adjusting the height of the compacted bottom of the groove by backfilling soil or excavating the bottom of the groove, backfilling the soil and compacting if the height of the bottom of the groove is too low, and excavating the soil at the bottom of the groove and compacting if the bottom of the process is too high.

S3, placing a pipeline seat at the bottom of the groove, which is as follows:

the pipeline axis carries out the unwrapping wire sign in the projection line of ditch groove bottom in the design bottom the ditch groove, places concrete pipe seat in the ditch groove bottom to adjustment pipeline seat to suitable position, make the pipeline place back on concrete pipe seat, pipeline axis is at the projection line of ditch groove bottom and the coincidence of ditch groove bottom sign, and pipeline seat is long 50m along pipeline axis direction, adjacent pipeline seat interval 2 m.

S4, hoisting the pipeline units in sequence, specifically as follows:

and hoisting the pipeline unit to the pipeline seat by using a crane, wherein the length of the pipeline unit is 5 m.

S5, coating cement mortar on the outer wall of the joint of the adjacent pipeline units, and forming a concrete connecting pipe covering the gap between the adjacent pipeline units after the cement mortar is solidified, wherein the concrete connecting pipe is as follows:

the thickness of the concrete connecting pipe is 1cm, the length of the concrete connecting pipe along the axis is 5cm, and the areas of the concrete connecting pipes which are respectively covered on the adjacent pipeline units are consistent.

S6, after the concrete connecting pipe is solidified, filling broken stones into the groove, and specifically, the concrete steps are as follows:

the particle size of the crushed stone is 8-12mm, the crushed stone is filled into the groove until the height of the surface of the crushed stone is within the height range of +/-2 cm of the height of the axis of the pipeline, the height range is marked by marking a mark on the surface of the pipeline, and the crushed stone can reach the marked range.

S7, injecting slurry towards the groove until the surface of the slurry is higher than the broken stone, wherein the concrete steps are as follows:

the ratio of water to soil in the slurry is 1: and 0.5, injecting the slurry until the height of the slurry liquid level is 25mm higher than the axis of the pipeline, marking the height by marking a mark on the surface of the pipeline, and enabling the slurry liquid level to reach the marked height.

S8, adopting a waterproof material to completely cover the top of the groove and then standing for 3d, wherein the method comprises the following steps:

cover the slot top through the tarpaulin and through the stone with the tarpaulin edge compaction for the tarpaulin seals the slot top, avoids the rainwater to leak into in the slot.

S9, backfilling soil into the groove to a soil layer height higher than the original pavement, which is as follows:

and (5) removing the waterproof cloth, and backfilling the soil to a height 1cm higher than the soil layer of the original pavement.

S10, compacting the backfilled soil to form a road soil layer, which is as follows:

and compacting the flattened and backfilled soil by a road roller to form a road soil layer.

S11, adjusting the height of a road soil layer to meet the design requirement of the road, and specifically comprising the following steps:

if the road soil layer height is too high, digging out the soil and compacting the soil, and if the road soil layer height is too low, backfilling the soil and compacting the soil so as to adjust the road soil layer height to meet the design requirements.

S12, paving a road, which comprises the following steps:

paving a base layer, a cushion layer, a pavement layer and the like on a road soil layer according to the original road pavement structure so as to repair the road.

The cement mortar used in step S5 of this example was the cement mortar of example 20, and the cement mortar used in step S5 of other examples was the cement mortar of examples 1 to 19.

The implementation principle of the embodiment is as follows: through packing into the rubble in the slot, because the rubble has the rigidity for the rubble can not pile up to closely knit state but has very strong holding power, through pouring into mud, utilizes the mobility of mud, makes soil infiltration in the rubble gap with the parcel rubble, treats in the mud moisture evaporation back, and the soil of wrapping up the rubble utilizes its viscidity restriction rubble motion, makes the rubble support the pipeline steadily, makes pipeline stable in structure be difficult for the fracture.

Example 22

Compared with example 21, the difference is only that:

the ratio of water to soil in the slurry in step S7 is 1: 0.65, and injecting the slurry until the height of the liquid level of the slurry is 27.5mm higher than the axis of the pipeline.

Example 23

Compared with example 21, the difference is only that:

the ratio of water to soil in the slurry in step S7 is 1: 0.8, injecting the slurry until the height of the liquid level of the slurry is 30mm higher than the axis of the pipeline.

Comparative example 1

Compared with example 4, the difference is only that:

zircon powder, fluorite powder and granite powder are not added in the step S02.

Comparative example 2

Compared with example 12, the difference is only:

triphenylsilane was not added in step S02.

Comparative example 3

Compared with example 12, the difference is only:

in step S02, 8-pentadecanone was not added.

Comparative example 4

Compared with example 16, the difference is only that:

in step S02, 8-pentadecanone and triphenylsilane were not added.

Experiment 1

The cracking index of the samples prepared from the cement mortars prepared in examples 1 to 20 and comparative examples was measured according to GB/T29417-2012 test method on the drying shrinkage cracking performance of cement mortars and concrete.

Experiment 2

The 7d flexural strength (MPa) of the samples prepared from the cement mortar prepared in examples 1 to 20 and each comparative example was examined according to the flexural strength test in GB/T50081-2002 Standard test methods for mechanical Properties of ordinary concrete.

Experiment 3

The 7d compressive strength (MPa) and 28d compressive strength (MPa) of the samples prepared from the cement mortar prepared in examples 1-20 and each comparative example were tested according to the compressive strength test in GB/T50081-2002 Standard test methods for mechanical Properties of ordinary concrete.

Experiment 4

The impermeability grade of the samples prepared from the cement mortars of examples 1 to 20 and comparative examples was determined according to the water penetration resistance test in GB/T50082-2009 Standard test methods for Long-term Properties and durability of ordinary concrete.

The specific assay data for experiments 1-4 are detailed in table 6:

TABLE 6

According to the comparison of the data of comparative example 1 and example 4 in table 6, zircon powder, fluorite powder and granite powder are added into cement mortar, so that the compressive strength of a sample prepared by the cement mortar is effectively improved, the flexural strength of the sample is improved to a certain extent, the structure of the sample is stable, the prepared concrete connecting pipe structure is stable, and adjacent pipeline units are connected more stably.

As can be seen from the comparison of the data of comparative example 2 and example 4 in Table 6, the addition of 8-pentadecanone alone to cement mortar did not significantly affect the impermeability of the specimens made from the cement mortar.

As can be seen from the comparison of the data of comparative example 3 and example 4 in Table 6, the addition of triphenylsilane alone to cement mortar did not significantly affect the impermeability of the specimens made from the cement mortar.

As can be seen from comparison of the data of comparative example 4 and example 4 in Table 6, addition of acridone alone to cement mortar did not significantly affect the impermeability of the specimens made from cement mortar.

According to comparison of data of examples 5-8 and example 4 in table 6, the addition of glass fiber and carbon fiber to cement mortar effectively improves the cracking resistance and the breaking resistance of the sample prepared from cement mortar, so that the prepared concrete connecting pipe has a stable structure and is not easy to damage, and thus adjacent pipeline units are stably connected.

According to comparison of data of examples 8-12 and example 4 in table 6, 8-pentadecanone and triphenylsilane are added into cement mortar and are matched according to a specific proportion, so that the impermeability of a sample prepared from the cement mortar is effectively improved, the prepared concrete connecting pipe has good impermeability and leakage resistance, the pipeline is not easy to leak from the joint of adjacent pipeline units, and the quality of the municipal road pipeline is improved.

According to the comparison of the data of the examples 13-16 and the example 4 in the table 6, the acridone, the 8-pentadecanone and the triphenylsilane are added into the cement mortar to be matched in a specific ratio, so that the impermeability of the sample prepared by the cement mortar is effectively further improved, the impermeability and leakage resistance of the prepared concrete connecting pipe are better, and the municipal road pipeline is less prone to leakage at the joint of the adjacent pipeline units.

According to the data of the examples 17-20 in Table 6, the samples prepared by cement mortar have better cracking resistance, better bending resistance, stronger compression resistance and better anti-permeability and anti-leakage performance, and the quality is better.

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 municipal road pipeline construction method is characterized in that: the method comprises the following steps:

s1, excavating a road to form a groove;

s2, leveling the bottom of the groove;

s3, placing a pipeline seat at the bottom of the groove;

s4, hoisting pipeline units in sequence;

s10, compacting the backfilled soil to form a road soil layer;

s12, paving a road;

the cement mortar coated on the outer wall of the joint of the adjacent pipeline units in the step S5 comprises the following components in parts by mass:

100 parts of Portland cement;

250 portions and 300 portions of fine aggregate;

50-80 parts of zircon powder;

30-60 parts of fluorite powder;

80-100 parts of granite powder;

10-15 parts of carborundum;

2-3 parts of a concrete thickener;

and 90-110 parts of water.

2. The method of claim 1 for municipal road pipeline construction, wherein: and in the step S6, the crushed stone is backfilled to the height range of +/-20 mm of the height of the crushed stone relative to the axis of the pipeline.

3. The method of constructing a municipal road pipeline according to claim 2, wherein: the particle size of the crushed stone filled in the groove in the step S6 is 8-12 mm.

4. The method of claim 1 for municipal road pipeline construction, wherein: the mass ratio of water to soil of the slurry injected toward the trench in the step S7 is 1: 0.5-0.8.

5. The method of constructing a municipal road pipeline according to claim 4, wherein: and in the step S7, slurry is injected towards the groove until the slurry level is 25-30mm higher than the pipeline axis.

6. The method of constructing a municipal road pipeline according to any one of claims 1 to 5, wherein: the cement mortar also comprises the following components in parts by mass:

5-8 parts of glass fiber;

3-5 parts of carbon fiber.

7. The method of constructing a municipal road pipeline according to any one of claims 1 to 5, wherein: the cement mortar also comprises the following components in parts by mass:

2-4 parts of 8-pentadecanone;

1-2 parts of triphenylsilane.

8. The method of constructing a municipal road pipeline according to claim 7, wherein: the cement mortar also comprises the following components in parts by mass:

0.4-0.7 part of acridone.

9. The method of constructing a municipal road pipeline according to any one of claims 1 to 5, wherein: the preparation method of the cement mortar comprises the following steps: