CN1346950A - Method for filling protective layer of embedded tube - Google Patents

Abstract

A filing method for protection layer of laid pipe is provided to prevent the inflow of unknown water and the run off of sewage by damage and cave in of pipe line, which comprises the steps of forming a cave of certain depth; forming a pipe protection layer more than 10 to 30 cm to protect the laid pipe; installing and connecting a pipe line on the upside of pipe protection layer; forming the consolidation soil filled layer more than 10 to 30 cm around the pipe line by filling the consolidation soil into the space around pipe line; forming a soil produced in field filled layer by filling the soil produced in field on consolidation soil filled layer; and then forming the pavement material or road layer.

Description

The method for filling protective layer of pipe laying

Technical field

The present invention relates to the burying underground in the fortification of various pipelines such as building or construction site sewer, water inlet and gas pipe, for the normal state that pipeline is remained on do not take place to leak etc. adopts the soil that condenses that is caused to come the method for filling protective layer of the pipe laying of pipe laying.

Background technique

Drainage pipeline is originally that to get rid of rainwater be the water route of the artificial laying of purpose, still, is difficult to this water route is used as the drainage pipeline that water under the handle is transferred to treatment plant, and therefore, the said drainage pipeline of people just has been born.

Although just there be the problem of the water of stream in drainage pipeline to underground leakage in the past, but it has become the problem of quite (giving prominence to) now.For example, in Korea S, spilling the following water and the excessive not clear water that come at the drainage pipeline on the limit, river course that becomes the water system area, Ba Er beach at water source, civic around Seoul and the capital has flowed in the region, city street of the region of preparing as public sewer, although preparing to have built time water treatment plant in advance before the drainage pipeline, but the following water yield of water treatment plant is more than the following water yield of design under flowing into, the capacity that has surpassed time water treatment plant, undressed water is down released endlessly, last water source is caused great harm, and this is the present situation in road known for everyone.

To this problem; no doubt be pipework correctness, be responsible for construction and the thing that must do of administrative institute afterwards; but also proposed a kind of like this requirement, promptly developed and to prevent from drop into the huge certain piping laying method that expends and can be protected of safeguarding budget and time, manpower afterwards.

As being the existent method that the practitioner was familiar with; when burying the pipeline of various purposes such as sewer, water inlet, gas pipe underground; excavate fortification; for the anxiety of breakage may not take place because of proof to external pressure not in pipeline after protecting; to remove big and assorted materials such as various rocks in the pipe laying place; the original soil that produces in establishing pipe and excavation returned bury, to finish the laying of pipeline.Especially; in order to protect described water inlet and gas pipe etc. to contingent external pressure after coming from; will be below having buried pipeline underground by lay the sand or the original soil of high-quality with suitable engineering mode; on the ground of putting in order, link described pipeline is set; and then around it, lay the sand or the original soil of high-quality again, implement the laying work of pipeline.

Described high-quality sand or original soil, in general be meant the soil of having removed impurity such as the above cobble of 40mm, the above earth of 75mm, tree root, rubbish and concrete.Therefore, at the on-the-spot high-quality original soil that uses of practice of construction,, just have the problem that engineering correspondingly must be arranged in order to remove these impurity.

Spoil is returned the common method of burying do not consider the proterties of former foundation soil and soil property, mechanical property fully.Be again, even when the ground behind excavation produces underground water, also just after underground water is got rid of, just lay and link pipeline, passed through the suitable time after, underground water further flow into the pipe laying place and makes setting of ground, under serious situation thus even the phenomenon that road damages can take place.

For preventing so phreatic inflow, above pipe, build and played the retaining wall that makes with concrete, below pipe, carried out ground arrangements such as foundation pit fortification, this has just produced will pay the more drawback of relevant engineering cost therewith.

On the other hand, from investigating down the ratio between investments of water treatment business, following water treatment plant accounts for 50～60%, and drainage pipeline accounts for 30～40%, and other operation expenses account for 5～10%.Therefore can understand, in order to improve the efficient of water treatment down, researched and developed with relevant academia by government by suitable proportion in the engineering of water treatment method down, in contrast, the relevant almost not exploitation of drainage pipeline that accounts for total engineering cost 30～40% is still following the method for always using and is carrying out, and does not consider from other conditions such as domestic terrian condition and civil engineerings, but standardized suitable mode always, this becomes the acarpous reason of engineering.

Especially, for attached causes such as laying the foundations of in the underground buried tube road, bringing, for institute of administrative department seldom is concerned about, this just has the shaky anxiety of engineering, this has just caused in case will safeguard the expense that is used for road excavation and recovery that the pipeline of shaky engineering will overpayment, and the problems such as petition of its people's life inconvenience have taken place the traffic offences that caused by such maintenance engineering is brought.

What be associated therewith is; be embedded in underground sewer; in the burying underground of water inlet and gas pipe etc.; formation always is; as shown in Figure 1; excavate out the ditch 1 of appropriate depth and certain-length; has base concrete layer 2 in the bottom surface of described ditch 1; the pipe arrangement 3 of many connecting states in described base concrete layer 2 upper support; in described ditch 1 as supported pipe arrangement 3 into 2 protection of described base concrete layer; have and filled native pipe arrangement protective layer 4, on described pipe arrangement protective layer 4, lay pavement materials such as concrete and pitch 5 and itself and the pavement of road that existed are become one.The curing time of base concrete layer is elongated in engineering, thereby becomes the basis that petition takes place.Furtherly, even after burying underground, under the situation under life in the inflow ditches such as water and sewage, described water residues in the soil, and level of ground water is uprised, and this just exists the problems such as reason that the durability of mating formation descends and setting of ground is provided.

In order to solve mentioned problem; Korean utility model registration No. 0179497 has taked pipe arrangement as shown in Figure 2 to bury structure underground; it is characterized in that: the ditch 10 that forms certain depth; 2 are listed as it is provided with a plurality of holes along its length on a part all around distribution pipe 20 on binding is arranged on the bottom surface of described ditch 10; have the pipe arrangement supporting portion 30 of mixing by proper proportion by soil and curing agent in described 2 inboards that are listed as the distribution pipe 20 that links; in described pipe arrangement supporting portion 30, be provided with a plurality of recesses by appropriate intervals; filling gravel 40 in two outsides of described pipe arrangement supporting portion 30 becomes to the through hole that forms is covered it on described waste pipe 20; a plurality of pipe arrangements are in supported state and are connected along its length on described pipe arrangement supporting portion 30; the pipe arrangement that each recess in described pipe arrangement supporting portion 30 is provided with the state of the linking portion that supports pipe arrangement 80 bears platform 50; in described ditch 10, resemble to be provided with the supported pipe arrangement of protection in the described pipe arrangement supporting portion 30 and filled native pipe arrangement protective layer 60, on described pipe arrangement protective layer 60, resemble and lay pavement material 70 becoming one with already present road surface.The domestic sewage that is produced in each family and shop and so on water flows into pipe arrangement and buries underground under the situation of part, owing to this water directly is that intermediary discharges with the distribution pipe, so have and when making groundwater recession, also reduced the moisture content in the soil, improved the durability of mating formation, setting of ground does not take place, and the effect of pipe arrangement breakage does not take place yet.

So, different with the present invention is, in case its to be infiltration with the water of domestic sewage of generations such as each family and shop and so on be prerequisite, the method that they are discharged by distribution pipe usually has the said problem that does not become the countermeasure that fundamentally solves actually.

The present invention proposes in order to solve the existing problem of the prior art of addressing, and its main purpose is to prevent to be embedded in the breakage and the subsidence of underground pipeline.

Another object of the present invention is to improve the treatment effeciency of following water treatment plant of pipework of being kept perfectly.

Another purpose of the present invention is, prevention by because of the following water outflow that breakage and subsidence caused of the inflow of open fire not and pipeline to prevent phreatic pollution, promptly play making also permanent conservation of nature environment of underground water nucleus formation.

A further object of the present invention is, because with guaranteeing that the coating of sheath and packed layer makes drainage pipeline keep existing durable years, is subjected to firmer protection simultaneously and can prolongs its durable years.

In order to achieve the above object; the invention provides the method for filling protective layer of burying pipe underground; promptly dig out the ditch of certain depth; form the sheath of guaranteeing of pipeline that the protection more than 10～30cm buries underground in the bottom of described ditch; described guarantee sheath above lay the binding pipe arrangement; fill the space around the described pipe arrangement and cause the native packed layer that condenses more than 10～30cm with the soil that condenses; on the described native packed layer that condenses, fill the on-the-spot soil that digs out and form the packed layer of the soil that digs out at the scene, lay at last and go up pavement material or form passage layers.

Summary of the invention

The method for filling protective layer of a kind of pipe laying of the present invention; in the method for pipe laying that is the various purposes of protection; it is characterized in that; dig out the ditch of certain depth; form the sheath of guaranteeing of protection pipe laying more than 10～30cm in the bottom (200) of described ditch; described guarantee sheath above lay pipe arrangement; on described pipe arrangement surrounding space is filled, condense soil and form the native packed layer that condenses more than 10～30cm; on the described native packed layer that condenses, fill the on-the-spot soil that digs out and form the soil layer that dig out at the scene, form pavement material or path layer at last.

In above-mentioned method for filling protective layer, the described soil that condenses is, add cement in the soil that digs out at the scene after, in the mixture that causes thus on one side with the curing agent that uses water-soluble hydrocarbon on the even spreading of mechanical atomizer, on one side mix and stir.

In above-mentioned method for filling protective layer; to the bad occasion of described bottom ground; in the soil that digs out at the scene general add cement and further mix be stirred into after unslaked lime makes that grogs is stable, owing to spreading described curing agent formation unfavorable foundation displacement layer need not to remake other foundation improvement work.

In above-mentioned method for filling protective layer, described bottom is needed soft and absorbs the occasion of percussion, add the careful damaged tire of pulverizing of the weight ratio of advancing the soil that digs out with respect to the scene and play buffer function and form and guarantee sheath and the native packed layer that condenses.

In above-mentioned method for filling protective layer, the weight ratio of the soil that digs out according to the scene and the input amount that moisture content is regulated the curing agent that is added, thereby the waterproof ability of regulating its performance.

Description of drawings

Fig. 1 is the sectional view of the existing pipe arrangement embedding manner of expression

Fig. 2 is the schematic representation of the existing another pipe arrangement embedding manner of expression

Fig. 3 is the sectional view of expression pipe laying method for filling protective layer of the present invention

Fig. 4 is the A-A line sectional view of Fig. 3

In the drawings, 1-ditch, 2-base concrete layer, 3-pipe arrangement; 4-pipe arrangement protective layer, 5-pavement material, 10-ditch, 20-waste pipe; 30-pipe arrangement supporting portion, 40-gravel, the 50-pipe arrangement bears platform, 60-pipe arrangement protective layer; the 70-pavement material, 80-pipe arrangement, 100-ditch; 200-unfavorable foundation displacement layer, 300-guarantees sheath, the 400-pipe arrangement; the 500-native packed layer that condenses, the packed layer of the soil that 600-digs out at the scene, 700-pavement material or passage layers.

Embodiment

Below, describe the present invention with reference to the accompanying drawings in detail.

In following explanation of the present invention,, be judged as and the indefinite occasion of aim of the present invention, the detailed description of then having omitted it for specifying of relevant known function or formation.So the term of back is a definition term of having considered function of the present invention, its intention or convention with user and utilization person becomes.Therefore, its definition overall content that should be based on this specification come fixed.

Sewerage of the present invention; the method for filling protective layer of various pipe layings such as water-supply line and gas pipe is that a kind of constitutive characteristic is: form in the bottom of the ditch 100 of certain depth that digs out and width and guarantee sheath 300; at this moment; if the ground of the bottom of described ditch 100 is soft; then cause other unfavorable foundation displacement layer 200 earlier; described guarantee sheath 300 above lay the pipe arrangement 400 that is used to protect; as used at improvement unfavorable foundation or soft foundation and when causing the protective layer of pipe laying; form the native packed layer 500 that condenses of filling with the soil of making that condenses; fill to go up the soil that digs out from the scene thereon and form the packed layer 600 of the soil that digs out at the scene, the various pipelines that the final protection that forms pavement material or passage layers 700 is buried underground on the packed layer 600 of the soil that digs out at described scene guarantee the sheath filling method.

Below, describe the present invention of such formation in detail according to Fig. 3.

In order to bury various pipelines such as sewer, water inlet and gas pipe underground, bury the position underground according to relevant various piping laying engineering construction guide excavations, be formed with the ditch 100 of certain depth and width.At this moment, bottom at described ditch 100, owing to have soft foundation or basic unit poorly by engineering foundation, so breakage of the pipe that in order to prevent to make setting of ground thus pipe laying is sunk simultaneously to be caused, the proportioning that generally will increase cement is to promote intensity, as having above effect, can have the unfavorable foundation displacement layer 200 of improvement unfavorable foundation at common gel cement or piling foundation engineering.

On the bottom of described ditch 100 or unfavorable foundation displacement layer 200, form be used for protecting pipeline guarantee sheath 300; described guarantee that laying above the sheath 300 links the pipe arrangement of burying underground 400 after; mix while doing suitable adjustment according to on-the-spot product with cement, unslaked lime and damaged tire thin slice with mixing machine in the soil that described scene is dug out; be filled into then by being mixed and made into the soil that condenses with the curing agent of paraffin hydrocarbon manufacturing on the spreading, formed to make and be in control the native packed layer 500 of condensing of protection.

Described sheath 300 and described native packed layer 500 usefulness of the condensing soil that condenses of guaranteeing forms; the described soil that condenses is that the weight ratio that adds the soil that digs out with respect to the scene in the soil that digs out at the scene is 2～7% portland cement; after mixing stirring; adopt the even spreading of mechanical atomizer to use the curing agent of water-soluble paraffin hydrocarbon, meanwhile evenly mix, stir made.

Here, if the cement that drops into when the gel cement engineering, just has the anxiety that crack performance takes place more than 10%, so the adding proportion of general cement is got in 7% scope usually.

Also have; in order to make the described sheath 300 and the native packed layer 500 that condenses guaranteed that the effect of the impact of soft effect and the various pipelines of absorption be arranged; in the process of making the described soil that condenses; further add 10～50% damaged tire chip when adopt adding cement 1～2%; in described bottom is the occasion of unfavorable foundation; then adopt adding 1～2% cement, the made soil that condenses of further simultaneously interpolation 2～5% unslaked limes forms.

If the soil property amount that dig out at such scene is bad; can in the soil that dig out at described scene, drop into, be mixed into unslaked lime slightly; make it play volcanic ash (pozzolana) reaction and make the particle-stabilised of soil; being mixed into special curing agent then makes its reinforcing and can form stable sheath and the basic foundation guaranteed; in order to sponge the impact of pipeline; the soil that the scene is dug out is with damaged tire and cement mixing; curing agent carries out strengthening construction on the spreading, just can prevent the breakage and the subsidence of pipeline.

Under the condition at the scene; in such formation guarantee sheath 300 and the native packed layer 500 that condenses in change and press to reinforce; brought into play the coagulation force of curing agent feature and its fluid-tight ability (below 10-5cm/s-waterproof) is improved; breakage and the such MIN uniaxial compressive strength of subsidence with the pipe that can prevent packed layer top; even flow out from the pipe of haveing no alternative but breakage and subsidence and water has taken place, it brings into play its particular performances also just can playing 1 filtration that resembles filtering fully by the self cleaning capacity of soil when guaranteeing sheath or packed layer.

Particularly, at the drainage pipeline of laying along the limit, river course and the execution conditions scene of pipe laying canal, phreatic inflow definitely is a problem, takes this method construction just can prevent phreatic inflow, the sinking of prevention ground.

Here, described commentaries on classics is pressed and is reinforced, and what say is to make material reinforced one-tenth thick close state in the bottom by adding weight and vibrating homenergic with reinforcings such as pressure roller machinery.Described uniaxial compressive strength, the whether intensity of saying represented of the maximum stress of the compression when making cylindric soil to be measured that compression failure takes place from single shaft direction (up and down) from upper and lower, left and right sides three-dimensional and just.

On the native packed layer 500 that condenses that has been reinforced accordingly with such field condition, the soil that digs out from scene backfill and form the packed layer 600 of the soil that digs out at the scene again, after having carried out the strengthening construction operation, spread final pavement material or path layer 700 on the packed layer 600 of the soil that digs out at described scene, this has just finished the pipe laying engineering.

Illustrate with specific embodiments of the invention below.

Embodiment

After for the pipe laying excavation works, in the soil that dig out at the scene that is taken place, add the damaged tire of 10～50% careful pulverizing and further add after 2～7% the cement, it is fully mixed, causing in the thing of mixing, solidify with the promotion in the even spreading Korean patent No. 0211348 of mechanical atomizer, and work the water-soluble paraffin hydrocarbon curing agent that prevents effect simultaneously, meanwhile make and cause thing well to mix with curing agent, in abundant stirring, after mixing and the spreading, on the former foundation soil of pipework, lay the high soil that condenses that is caused of 10～30cm, according to sewer, the construction guide of various piping laying engineerings such as water inlet and gas pipe, promptly according to the kind (steel pipe of various pipelines, the 10cm cast iron tube, the VR pipe, 20cm PC pipe, 30cm PE pipe) and the size of pipe, below the pipe laying place, lay the basic courses department of the superior in quality sand of 10～20cm as the rigidity pipe duct.Basic courses department as the soft pipe duct of 10～20cm; preferably in protection and illustrated the enriching like that of basic conical section according to the sewer canal in the water channel facility standard promulgated by the ministries or commissions of the Central Government of Korea S's Department of Environment; reinforce according to the reinforcing rate of soil simultaneously; as finding out from following table 1, the single shaft intensity of guaranteeing the sheath performance is at 5～15kg/cm ²More than just can make pipeline corresponding with hydraulic pressure or soil pressure, and sufficient support force is brought into play in the load-carrying of vehicle, its waterproof ability uses the coefficient of permeability of the following water water leakage ratio that the piping failure that produced and subsidence cause to represent that coefficient of permeability is 10 ^-5Be considered to waterproof below the cm/s, even supposition has taken place to leak, also because thick basic foundation protective layer makes the following water that passed through become non-harmful underground water because of the self cleaning capacity of soil.Also have,, add 2～5% unslaked lime again, mix, make the stable curing agent of grogs on the spreading with adding 2～5% cement in the occasion of unfavorable foundation, change press reinforce after, just can form the unfavorable foundation displacement layer.

The uniaxial compressive strength of the soil that dig out at [table 1] scene and the experimental result of coefficient of permeability

Maintenance day	Compression strength (kg/cm 2)		Coefficient of permeability (cm/s)
				The soil that dig out at the scene	Paraffin hydrocarbon+cement
	????1	????3.73				????15.56	????3.66×10 8
????7			????4.42	????17.20	????7.32×10 9
	????14	????4.37				????16.33	????4.78×10 9
????28			????4.58	????18.54	????4.71×10 9

* experimental condition: water-soluble paraffin hydrocarbon A type, cement, unslaked lime, the flying dust of Shi Yonging is 5% respectively

* sample moulding: γ _DmaxThe 95%/W of (maximal density of drying regime when reinforcing experiment) _OMC(optimum moisture content)

A 3% moistening side

As previously mentioned; use the curing agent of cement and paraffin hydrocarbon manufacturing just can bring into play full intensity and waterproof ability in the soil that digs out at the scene; but firm character for the various pipelines of protection; by using flexible and pulverizing damaged tire or useless vinyl resin soft component; can prevent the breakage of pipeline; the adding proportion of regulating damaged tire according to cumulative water-oil ratio and volume density makes the elasticity generation difference of guaranteeing sheath by the addition of damaged tire.Also have, optimum condition is to add 30～50% degree to use.

Particularly, implement the occasion of pipework in the soft foundation area, though caused huge engineering cost input by carrying out the foundation pit engineering, just found to have the effect that improves soft foundation as the construction of basic unit fundamentally of 30～50cm degree with the soil that condenses that this method causes.It is well-known improveing soft foundation with the gel cement engineering method that has had, in such engineering, added this engineering method curing agent peculiar, that make with paraffin hydrocarbon, the distinctive consolidation of performance curing agent, having induced the fixed of the pulverizing damaged tire of soil and cement or unslaked lime and interpolation or useless vinyl resin, therefore is a kind of epoch-making method of bringing into play its intensity, promoting waterproof ability.

As mentioned above; when burying various pipeline underground, return the soil that the scene of burying digs out by this method form like that together caused guarantee sheath and packed layer the time; then perhaps can what to increase initial investment and engineering cost; but; from the long-period of management aspect; reduced because of pipeline subsidence and the damaged maintenance management expense that causes; with following expense; promptly; prevented by underground stripping water etc. not under the flowing into that cause of the inflow of open fire the water yield of water treatment plant surpass more than 20～30% and the running efficiency of water treatment plant be obstructed; because it is narrow at the area of base in urban district; increase area and eliminate these improper problems, but also saved the expense of handling excess capacity.Furtherly; because the water quality long-term stability that flows into; make automated operation and maintenance management become possibility; under the situation of soft foundation; the ground displacement layer as 1 layer; can prevent the sinking that deadweight and load caused by the pipeline of being laid, be the method for guaranteeing sheath and packed layer that causes abundant compensation effect so confirmed this.

The present invention can have various distortion, can get form miscellaneous simultaneously, but with special embodiment detailed explanation done in aforementioned invention.Yet, the present invention be not limited in described in the detailed description of the invention and special form, and should be understood to by all changes form, equivalent and substitute in the defined thought range of the present invention of appended claim scope.

The present invention according to above explanation; improved the treatment effeciency of time water treatment plant by method as described above; prevent the outflow of the following water that the breakage by the inflow of open fire not and pipeline causes and prevented phreatic pollution; even when having generated underground water, still can provide permanent conservation of natural environment.

Also have; even badly cause the pipeline subsidence or when damaged because of constructing; change to press reinforce and the guarantee sheath and the packed layer of performance Adhesion force cause thing to be not easy to crumble; prevented the phenomenon that native sand deposits in pipeline; do not have because of dredging the inconvenience that is brought; sheath can resemble to present really constructs the gradient for guaranteeing of having solidified, has also just eliminated the danger of flowing backwards.

The following water treatment plant of She Zhiing on the ground, its accident and unusual generation are monitored easily, from the maintenance management aspect, as long as there is abundant skilled person just can be guaranteed.But, in contrast, monitor, to be embedded in underground pipeline be exactly so uneasy to spot check, when accident or abnormal conditions have taken place, not only be difficult to find, and actual conditions are that its adaptibility to response is also slow.

Further from function aspects, the significance of burying underground of sewer is not inferior to water treatment plant down, and in the facility operation expenses scale of following water treatment plant self about 40% burying underground for sewer, therefore, this is the important engineering that be subjected to reasonable care, just can prevent the shaky of its in advance by firm construction.

This method guarantee sheath and packed layer; even in the occasion that makes piping failure or subsidence because of Adhesion force; almost there is not silt to flow in the pipeline yet; underground water or the not inflow of open fire have been blocked; thereby blocked the excessive inflow of downward water treatment plant; the cycle that 1 year or 2～3 years mediation is 1 time can be extended, and this just can reduce budget.Furtherly; owing to formed the protecting foundation layer; certain gradient is arranged in the bottom; make down flowing of water level and smooth; prevented that decorating film and bulkrage are in ducted depositional phenomenon; having reduced the distributing of stench of corrupt deposit, is a kind of extremely superior sheath and packed layer formation method of guaranteeing.Also have, each pipeline that is embedded in underground (water supply pipeline, communication, coal gas) such as other various pipelines is all coated by the pipe packed layer, can eliminate impairment factor miscellaneous.

And, the subsidence of pipeline and damaged water is infiltrated through in the soil and polluted soil on every side, underground water has become the arch-criminal of the underground environmental pollution of surrounding area, and but, the present invention can prevent this situation and reduce underground environmental pollution.Having, with the sewer of guaranteeing that sheath and packed layer have coated, keeping existing durable years, be subjected to firm protection simultaneously and can prolong its durable years, is very useful.

Claims (5)

1. the method for filling protective layer of a pipe laying; in the method for pipe laying that is the various purposes of protection; it is characterized in that; dig out the ditch (100) of certain depth; what form protection pipe laying more than 10～30cm in the bottom (200) of described ditch guarantees sheath (300); described guarantee sheath above lay pipe arrangement (400); on described pipe arrangement surrounding space is filled, condense soil and form the native packed layer (500) that condenses more than 10～30cm; on the described native packed layer that condenses, fill the on-the-spot soil that digs out and form the soil layer (600) that digs out at the scene, form pavement material or path layer (700) at last.

2. the method for filling protective layer of various pipe layings according to claim 1; it is characterized in that the described soil that condenses is, add cement in the soil that digs out at the scene after; in the mixture that causes thus on one side with the curing agent that uses water-soluble hydrocarbon on the even spreading of mechanical atomizer, on one side mix and stir.

3. the method for filling protective layer of various pipe layings according to claim 1; it is characterized in that; to the bad occasion of described bottom ground; in the soil that digs out at the scene general add cement and further mix be stirred into after unslaked lime makes that grogs is stable, owing to spreading described curing agent formation unfavorable foundation displacement layer need not to remake other foundation improvement work.

4. the method for filling protective layer of various pipe layings according to claim 1; it is characterized in that; described bottom is needed soft and absorbs the occasion of percussion, add the weight ratio of advancing the soil that digs out with respect to the scene careful pulverizing damaged tire and play buffer function and form and guarantee sheath and the native packed layer that condenses.

5. according to the method for filling protective layer of each the described various pipe layings in the claim 2 to 4, it is characterized in that, thus the waterproof ability that the weight ratio of the soil that digs out according to the scene and input amount that moisture content is regulated the curing agent that is added are regulated its performance.

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