CN208981045U

CN208981045U - A kind of reinforcement of soft soil roadbed

Info

Publication number: CN208981045U
Application number: CN201821759304.6U
Authority: CN
Inventors: 郑伟群
Original assignee: Guangdong Huang Ye Construction Engineering Co Ltd
Current assignee: Guangdong Huazheng Construction Engineering Co ltd
Priority date: 2018-10-29
Filing date: 2018-10-29
Publication date: 2019-06-14
Anticipated expiration: 2028-10-29

Abstract

The utility model discloses a kind of reinforcement of soft soil roadbeds, including heavy tamping treatment section and drainage sunk well section two parts, heavy tamping treatment section process first is carried out to weak soil, carrying out drainage sunk well section process, the heavy tamping treatment process includes strong rammer formation Macadam Pier in weak soil, it is laid with blotter and is equipped with spinning geotextile layer, the blotter is set to above Macadam Pier, including the first blotter under and in the second upper blotter, the Woven geofabric layer is between the first blotter and the second blotter, the drainage sunk well section process includes successively being laid with drain bar from bottom to up, it is laid with TGXG, preloading sea sand, wherein sand packet littoral barrier is laid with to the end of TGXG before preloading sea sand.The utility model construction is simple, use is tamping road bed, discharging consolidation roadbed combines so that roadbed is firmer.

Description

A kind of reinforcement of soft soil roadbed

Technical field

The utility model relates to technical field of road construction, in particular to a kind of reinforcement of soft soil roadbed.

Background technique

In highway subgrade process of construction, since the roadbed filling under native state is loosely organized, stabilized soil pavement is all It is poor, along with certain sections are on soft soil foundation, highway subgrade is caused to be difficult to meet road travel load and natural environment The requirement of effect, this gives manually being compacted again with regard to inevitable requirement to roadbed, that is, carries out necessary consolidation process engineering, to guarantee The stabilized soil pavement index of roadbed meets the requirement of design, specification.The major project of subgrade strengthening engineering is the natural side of support Slope is to keep soil stabilization or reinforce subgrade strength and stability, and protects side slope under water temperature change condition from destroying.

In the prior art, roadbed is handled by subgrade strengthening technology, the mechanism of action substantially has the displacement of soil, soil Improvement, soil reinforcement three classes, wherein native displacement, as the term suggests be exactly to change the soil of Soft Soil Layer to fill out as good matter soil, such as sand pad Layer etc., although such construction method is effectively, construction intensity is larger；The improvement of soil is passed through on the basis of existing roadbed The means such as electricity, heat, mechanics, chemistry, consolidate subgrade soils, or increase the density of subgrade soils, and such method is directed to specific roadbed, The method cannot be general；The reinforcement of soil is the shear property to tighten and improve subgrade soils, will using netting, film, sheet pile etc. Subgrade soils constrain, or are put into soil the high supporting material of tensile strength so as to form composite road bed, although this is greatly The intensity of roadbed is enhanced, but the construction time is longer.

To sum up, need to develop it is a kind of both reinforced to soft soil roadbed, and difficulty of construction and construction intensity relative ease It is reinforcing road bed.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of construction is simple according to above-mentioned the deficiencies in the prior art, The reinforcement of soft soil roadbed combined using tamping road bed, discharging consolidation roadbed.

In order to achieve the above object, the technical solution of the utility model are as follows: a kind of reinforcement of soft soil roadbed, including heavy tamping treatment are disconnected Face and drainage sunk well section two parts first carry out heavy tamping treatment section process to weak soil, are carrying out drainage sunk well section process, institute Stating heavy tamping treatment process includes strong rammer formation Macadam Pier in weak soil, is laid with blotter and is equipped with spinning geotextile layer, described Blotter is set to above Macadam Pier, described to have spinning soil including the first blotter under and in the second upper blotter For work layer of cloth between the first blotter and the second blotter, the drainage sunk well section process includes from bottom to up successively It is laid with drain bar, is laid with TGXG, preloading sea sand, wherein to be laid with sand packet to the end of TGXG before preloading sea sand Littoral barrier.

It is further described as to the utility model:

Preferably, the lower section of the Macadam Pier is equipped with rubble sandy gravel stratum.

Preferably, it includes main tamping point and secondary tamping point that the strong rammer, which forms Macadam Pier, and the main tamping point and secondary tamping point are in pros Shape, width are 140cm~158cm, the adjacent main tamping point and secondary tamping point, main tamping point and main tamping point, secondary tamping point and secondary tamping point Between spacing be 3m.

Preferably, the drainage sunk well section process be laid with after TGXG to be laid in sand process, it is described in Sand with a thickness of 48cm~55cm.

Preferably, non-woven geotechnical cloth layer is equipped between second blotter and the end of TGXG.

Preferably, the lower section of the sand packet littoral barrier is also equipped with the rubble that diameter is 6cm~8cm.

Preferably, the preloading sea sand with a thickness of 20cm~30cm.

The beneficial effects of the utility model are:

1. the utility model first carries out heavy tamping treatment section process to weak soil, drainage sunk well section process, strong rammer are being carried out It handles section to carry out using main rammer, the secondary order rammed, main tamping point and pair tamping point are square, and width is 140cm~158cm, institute Adjacent main tamping point and secondary tamping point, main tamping point and main tamping point are stated, the spacing between secondary tamping point and secondary tamping point is 3m, this is practical new Type compacting is close, tamps high treating effect；Drainage sunk well section uses piling prepressing, squeezes out moisture excessive in subgrade soils, with It realizes jam-packed grogs, improves compression strength, achievees the purpose that reinforcing road bed, overall structure is simple, is suitable for a variety of soft soil roadbed Construction.

2. the utility model is equipped with Woven geofabric layer and non-woven geotechnical cloth layer, non-woven geotextile has between good fabric Gap has good adhesive force, has deformation adaptability well since fiber softening has certain lear energy simultaneously, There is good flat drainage ability, the attachment that soft surface Multiple level has good coefficient of friction that can increase grogs etc. simultaneously Ability, Woven geofabric layer and non-woven geotechnical cloth layer make soft soil roadbed with outstanding isolation water, reinforcing road bed protection work With the tensile strength for improving roadbed is high.

Detailed description of the invention

Fig. 1 is the utility model heavy tamping treatment section structure diagram；

Fig. 2 is the utility model drainage sunk well section structure diagram；

Fig. 3 is the strong rammer structural schematic diagram that the utility model heavy tamping treatment section forms Macadam Pier process；

Fig. 4 is the utility model drainage sunk well section end laying structure schematic diagram;

Fig. 5 is the enlarged drawing of part A in Fig. 1.

In figure: 1, Macadam Pier；2, the first blotter；3, the second blotter；4, Woven geofabric layer；5, drain bar； 6, TGXG；7, sea sand；8, sand packet littoral barrier；9, rubble sandy gravel stratum；10, main tamping point；11, secondary tamping point；12, middle sand；13, nothing Spin geotextile layer；14, rubble.

Specific embodiment

The structural principle of the utility model is described in further detail with reference to the accompanying drawing.

As shown in Figure 1 to 4, the utility model is a kind of reinforcement of soft soil roadbed, including heavy tamping treatment section and drainage position Section two parts are managed, heavy tamping treatment section process first is carried out to weak soil, are carrying out drainage sunk well section process, the heavy tamping treatment Process includes strong rammer formation Macadam Pier 1 in weak soil, is laid with blotter and is equipped with and spins geotextile layer 4, the blotter Above Macadam Pier 1, including the first blotter 2 under and in the second upper blotter 3, the Woven geofabric layer 4 between the first blotter 2 and the second blotter 3, and the drainage sunk well section process includes successively spreading from bottom to up If drain bar 5, be laid with TGXG 6, preloading sea sand 7, the preloading sea sand 7 with a thickness of 20cm~30cm, wherein in preloading Sand packet littoral barrier 8 is laid with to the end of TGXG 6 before sea sand 7, the lower section of the sand packet littoral barrier 8 is also equipped with diameter For the rubble 14 of 6cm~8cm.

In the present embodiment, Woven geofabric endwise tensile strength is 60KN/S, transverse tensile strength 50KN/S, rate elongation 30%, permeability 0.05cm/s, effective aperture 0.15mm.

As shown in Figure 1, the lower section of the Macadam Pier 1 is equipped with rubble sandy gravel stratum 9.

As shown in figure 3, the strong rammer, which forms Macadam Pier 1, includes main tamping point 10 and secondary tamping point 11, the main tamping point 10 and pair Tamping point 11 is square, and width is 140cm~158cm, the adjacent main tamping point 10 and secondary tamping point 11, main tamping point 10 and main rammer Point 10, the spacing between secondary tamping point 11 and secondary tamping point 11 is 3m, and main tamping point 10,11 single-rammer energy 2000 of secondary tamping point~ 4000KN.m.Construction before select at the scene by design requirement representativeness section carry out examination rammer, with obtain corresponding technical parameter with Instruct large-area construction；It is every ram number all over every and mainly rammed by scene examination determine, the present embodiment section work point is just fixed every all over every Point 6 is hit, last is completely rammed all over for low energy, is taken rammer mutually and is rammed trace no more than 1/2, every to be no less than three weeks all over time interval；Strong rammer It is disposed, last two, which hit average ramming volume, otherwise should increase no more than 5cm and ram pass.

As shown in Fig. 2, the drainage sunk well section process be laid with after TGXG 6 to be laid in sand 12 process, The middle sand 12 with a thickness of 48cm~55cm.

As shown in figure 4, being equipped with non-woven geotechnical cloth layer 13 between second blotter 3 and the end of TGXG 6.

The process roadbed filling of drainage sunk well section described in the present embodiment is sea sand 7, and embankment side slope is 1:1.5, excavation side Slope is 1:1.Subgrade Compaction (heavy compaction standard), embankment section: road slot bottom 0--80cm compactness is 95%, road slot bottom 80cm Following compactness is 93%, it should be noted that filling out preceding compacting, compactness 95% before filling roadbed.The status embankment gradient is suddenly in the oblique of 1:5 Step should be dug (containing vertical disconnected direction) on slope, step is 2 meters wide, and step bottom there should be the intilted gradient of 1.5%-4%, digs before step clearly Screefing and tree root；It should ensure that road bed or less has 80 centimetres of high-quality roadbeds in car lane part.It is designed in the present embodiment Drain bar 5 used is the big flux drain bar 5 of 1004mm, and 5 end of drain bar set need to enter sand bedding course at least 25cm, this implementation 12 bed course of sand is using general middle sand 12 in example, and when sand bedding course paving is filled out, coefficient of loose laying is greater than 1.3, and then flat vibration is matched in watering Close, 90% or more the compactness of dynamic instrument vibration；The present embodiment is additionally provided with 8 french drain of sand packet littoral barrier, 5 meters along longitudinal direction of 8 french drain of sand packet littoral barrier Setting together, sets diameter as 75mm perforated plastic PVC drain pipe, PVC drain pipe surrounding wraps up (nothing with non-woven geotextile in french drain When spinning geotextiles elongation<50%, gripping strength>=1100N, tearing strength>=400N, CBR bursting strength>=2750N；Nonwoven soil When work cloth elongation >=50%, gripping strength >=700N, tearing strength >=250N, CBR bursting strength >=1350N), draining with holes Pipe circular hole is uniformly arranged along tri- row of Guan Zhoufen, and 7.5 centimetres of advance；Surcharge preloading, surcharge preloading height 2.0 are answered when drainage subsidence Meter, the earthwork of desurfacing surcharge preloading re-lays pavement structure after compacting to road slot bottom when being laid with pavement structure after settlement stability.

Above descriptions are merely preferred embodiments of the utility model, it is all according to the technical solution of the utility model to On embodiment made by any subtle modifications, equivalent variations and modifications, belong to the range of technical solutions of the utility model It is interior.

Claims

1. a kind of reinforcement of soft soil roadbed, including heavy tamping treatment section and drainage sunk well section two parts, it is characterised in that: first to soft Soil carries out heavy tamping treatment section process, is carrying out drainage sunk well section process, the heavy tamping treatment process is included in weak soil by force Rammer forms Macadam Pier, is laid with blotter and is equipped with spinning geotextile layer, and the blotter is set to above Macadam Pier, is included in Under the first blotter and in the second upper blotter, the Woven geofabric layer is located at the first blotter and second broken Between stone bed course, the drainage sunk well section process includes successively being laid with drain bar from bottom to up, being laid with TGXG, preloading sea Sand, wherein to be laid with sand packet littoral barrier to the end of TGXG before preloading sea sand.

2. reinforcement of soft soil roadbed according to claim 1, it is characterised in that: the lower section of the Macadam Pier is equipped with rubble gravel Layer.

3. reinforcement of soft soil roadbed according to claim 1, it is characterised in that: it includes main tamping point that the strong rammer, which forms Macadam Pier, With secondary tamping point, the main tamping point and secondary tamping point are square, and width is 140cm~158cm, and the adjacent main tamping point and pair are rammed Point, main tamping point and main tamping point, the spacing between secondary tamping point and secondary tamping point is 3m.

4. reinforcement of soft soil roadbed according to claim 1, it is characterised in that: the drainage sunk well section process is laid with geotechnique The process of sand in being laid with after grid, the middle sand with a thickness of 48cm~55cm.

5. reinforcement of soft soil roadbed according to claim 4, it is characterised in that: second blotter and TGXG Non-woven geotechnical cloth layer is equipped between end.

6. reinforcement of soft soil roadbed according to claim 1, it is characterised in that: the lower section of the sand packet littoral barrier is also equipped with Diameter is the rubble of 6cm~8cm.

7. reinforcement of soft soil roadbed according to claim 1, it is characterised in that: the preloading sea sand with a thickness of 20cm~ 30cm。