CN210947064U - Rainwater pipeline backfills structure suitable for silt matter weak soil - Google Patents

Abstract

The utility model provides a rainwater pipeline backfilling structure suitable for silt soft soil, which comprises a foundation pit, wherein a reinforced concrete base layer, a mortar leveling layer and a rainwater pipeline are arranged in the foundation pit from bottom to top; mixed fillers of graded broken stones and cement paste are filled around the rainwater pipeline; and a steel bar mesh is arranged above the mixed filler, steel fiber concrete is arranged above the steel bar mesh, and an asphalt layer is laid above the steel fiber concrete. The utility model discloses a graded broken stone combines the grout, improves impervious, bulk strength, satisfies the whole service function of road.

Description

Rainwater pipeline backfills structure suitable for silt matter weak soil

Technical Field

The utility model belongs to the technical field of the escape canal, concretely relates to rainwater pipeline backfills structure suitable for silt matter weak soil.

Background

The prior domestic pipeline backfilling basically stays on the construction technology level of medium-coarse sand backfilling, lime soil backfilling and concrete encapsulation matching graded broken stone, although the construction technology of the form can meet the pipeline backfilling construction function, the concrete full encapsulation cost is high, the medium-coarse sand matching graded broken stone backfilling is easy to lose, the cost for replacing and managing a pavement structure layer and a pipeline at the later stage is higher, the influence on the process maintenance and the social life is larger, and particularly in the urban environment comprehensive improvement project, the investment approximate calculation, the traffic and the like are greatly influenced.

The construction method for backfilling the soft soil and the crushed stone with the silt and the grouting rain sewage pipeline can greatly solve the contradictions, has reliable safety and quality, saves the manufacturing cost, improves the construction efficiency, simultaneously keeps the structural strength of the road surface, ensures the smooth urban traffic, has advanced technical idea and meets the requirements of safe and civilized construction.

The current escape canal appears the escape canal easily and sinks, concrete fracture, the later stage in escape canal maintains the pipe and supports difficult scheduling problem, produces the phenomenon of jumping a car.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be not enough to above-mentioned prior art, the utility model provides a rainwater pipeline backfill structure for silt matter weak soil adopts the graded rubble to combine the grout, improves impervious, bulk strength, satisfies the whole service function of road.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a rainwater pipeline backfill structure suitable for silt soft soil is characterized by comprising a foundation pit, wherein a reinforced concrete base layer, a mortar leveling layer and a rainwater pipeline are arranged in the foundation pit from bottom to top; mixed fillers of graded broken stones and cement paste are filled around the rainwater pipeline; and a steel bar mesh is arranged above the mixed filler, steel fiber concrete is arranged above the steel bar mesh, and an asphalt layer is laid above the steel fiber concrete.

Further, the steel fiber doping amount in the steel fiber concrete is 50kg/m³。

Further, the cement slurry adopts a mixing ratio of 1: 1 configuration.

Has the advantages that: the utility model adopts a reinforced concrete foundation layer and a mortar leveling layer to treat the foundation, so as to prevent the drainage ditch from sinking; the graded broken stone is combined with the grouting process, so that the impermeability and the overall strength are improved, and the overall use function of the road is met; the C50 steel fiber concrete is adopted, and the mixing amount is 50kg/m³And a layer of reinforcing mesh is laid below the pavement to prevent later pavement cracking. The utility model has the advantages of to solving rainwater pipeline settlement, concrete fracture and later maintenance difficulty, the construction is convenient, the quality is reliable, and the technical theory is advanced, more accords with the requirement of ecological environmental protection, green construction, civilized construction.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

reference numbers in the figures: 1. a foundation pit; 2. a reinforced concrete foundation layer; 3. leveling mortar; 4. a rainwater pipeline; 5. reinforcing mesh sheets; 6. steel fiber concrete; 7. an asphalt layer; 8. mixed filler of graded broken stone and cement paste.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The utility model discloses a construction steps includes:

step 1: laying steel bar net sheet and pouring concrete base layer

After the elevation of the bottom of the groove is dug, firstly, a plate tamper is used for tamping the soil body of the bottom of the groove, commercial concrete is used as basic concrete, asphalt on two sides is protected by adhesive tapes and geomembranes before concrete pouring, a layer of phi 12@150 reinforcing steel bar net is laid at the bottom of the groove, the elevation is controlled by a measurer, a concrete cushion layer is put on a slope and is in the same direction with a cross slope of an asphalt pavement, a diversion slope is from high to low and points to a drainage outlet of a system, meanwhile, a leveling layer made of M10 cement mortar is reserved for 3-5cm, and then, C15 concrete is used for.

Step 2: mortar leveling

In order to ensure that the ditch and the substrate are highly bonded to form a whole, a layer of 1:2 dry-mixed cement mortar with the thickness of 30mm is fully paved on the concrete foundation at the bottom of the ditch, and then strip line leveling is carried out according to elevation and gradient, wherein the thickness can be properly adjusted according to the flatness of the concrete substrate.

And step 3: rainwater pipeline positioning and placing

Firstly, the height and the central line position of the rainwater pipeline in the direction are determined by pulling the wire, cement mortar is adopted for leveling, the rainwater pipeline is placed on the wire, and the height and the central line are adjusted to be consistent with the pulling wire.

And 4, step 4: preparation for backfill construction

(1) Before construction, the foundation pit is cleaned, and the foundation pit comprises a scattered template, soil blocks and accumulated water.

(2) And marking the foundation pit by layers to ensure the construction thickness of each layer.

(3) And carrying out technical background crossing on field construction personnel.

(4) And detecting the backfill material to ensure that the material is qualified. The material should be tough, wear resistant, and have many sharp corner blocks.

And 5: backfill graded crushed stone

(1) And calculating the discharge quantity according to the backfill quantity by taking every 30m as a section.

(2) After the unloading is finished, paving and leveling the stone manually, wherein the number of the manual paving system is controlled to be 1.25-1.3.

Step 6: and (5) tamping graded broken stones.

(1) The pipe cavity part is tamped by a small frog hammer, and the pipe top is vibrated and rolled by a small double-steel wheel.

(2) And (3) rolling the graded broken stones, preferably rolling for 4 times from two sides to the middle at a medium and low speed, so that the graded broken stones are tightly inserted to form a plane.

And 7: cement preparation

(1) 300kg of electronic scale with the precision of 10g is adopted

(2) Adopting a water-cement ratio of 1: 1 cement paste, the specific gravity of the cement paste is 1.512.

(2) Materials required per 100L cement slurry capacity: 75.63kg of water and 75.63kg of water.

And 8: grouting agent

(1) And (4) rolling the graded broken stones, and then grouting.

(2) When grouting, the concrete should be poured uniformly to fill the holes between the gravels, so as not to sink. The corners of the gravel should be exposed above the cement slurry.

And step 9: compaction detection

(1) The compactness of the pipe cavity part is 93 percent, the compactness of the pipe top is 85 percent at 50cm, and the compactness of the pipe top is more than 50cm to 95 percent of the bottom of the pavement structure layer.

(2) The compaction degree detection adopts a sand filling method for testing.

Step 10: lay reinforcing bar net piece

And paving a layer of phi 12@100 steel mesh at a position 20cm below the road surface.

Step 11: steel fiber concrete backfill

And pouring concrete, and finally pouring to the paved asphalt pavement, wherein both sides of the asphalt pavement are required to be uniformly poured simultaneously, the concrete is vibrated when being poured, the concrete is required to be vibrated until the concrete is compact, the compact mark is that the concrete stops sinking, no air bubbles are generated, the surface is flat and slurry, and the trench is kept horizontal and the corresponding installation height is ensured to be unchanged in the concrete pouring process.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (2)

1. A rainwater pipeline backfill structure suitable for silt soft soil is characterized by comprising a foundation pit (1), wherein a reinforced concrete base layer (2), a mortar leveling layer (3) and a rainwater pipeline (4) are arranged in the foundation pit (1) from bottom to top; graded broken stones and cement paste are filled around the rainwater pipeline (4); a steel bar net piece (5) is arranged above the graded broken stones and the cement paste, steel fiber concrete (6) is arranged above the steel bar net piece (5), and an asphalt layer (7) is laid above the steel fiber concrete (6).

2. A storm water pipe backfill structure for muddy soft soils according to claim 1, characterised in that said steel fibre concrete (6) is C50 steel fibre concrete.

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