CN112095381A

CN112095381A - Construction method for soft roadbed treatment

Info

Publication number: CN112095381A
Application number: CN202010978349.8A
Authority: CN
Inventors: 周鹏; 占昌清; 孙纯; 池良飞
Original assignee: China MCC17 Group Co Ltd
Current assignee: China MCC17 Group Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2020-12-18
Anticipated expiration: 2040-09-17
Also published as: CN112095381B

Abstract

The invention discloses a construction method for soft roadbed treatment, and belongs to the field of soft roadbed section construction. Firstly, excavating all earthwork in a filling and changing treatment section, and excavating 180-cm wide sand ditches at specified positions at equal intervals by using a barrier plate according to design requirements, wherein the sand ditches are 30-50 cm lower than a roadbed; inserting side baffles with the depth of 70-100cm into two sides of a road foundation treatment range, and then excavating drainage ditches and water collection wells on the outer sides of the side baffles; digging backfill ditches with the same depth between two adjacent groups of partition plates, then backfilling rubbles in each section of backfill ditch, burying filter pipes in the sand ditches, and then backfilling medium-coarse sand reverse filter layers in the sand ditches; and finally, removing all the blocking plates, introducing rubble and underground water in the sand ditch into the drainage ditch and the water collecting well through the water filter pipes for discharging, and removing the side baffle after the drainage work is finished. Avoid the occurrence of 'springs' in the rubble replacement and filling treatment, and ensure the stability of the rubble replacement and filling. The mode is safe and reliable, simple to operate, and the quality is guaranteed, and the cost of precipitation can be greatly reduced.

Description

Construction method for soft roadbed treatment

Technical Field

The invention relates to the technical field of soft foundation road section construction, in particular to a construction method for soft foundation treatment.

Background

In the plain zone of Yangtze river edge alluvial pile, the groundwater is abundant, the soil moisture content is large, because the roadbed treatment and the roadbed soil moisture content are large, the roadbed 'spring' phenomenon is easy to appear in the road section, the influence on the roadbed is serious, the method of well point precipitation, pipe well precipitation and the like is high in manufacturing cost and long in construction period, and how to economically and high-quality the roadbed is constructed in the plain zone of Yangtze river edge alluvial pile is a difficult problem.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and therefore provides a construction method for soft roadbed treatment.

In order to achieve the purpose, the invention adopts the following technical scheme:

a construction method for soft roadbed treatment comprises the following steps:

A. firstly, excavating all earthwork of a replacement and filling treatment section, and excavating 180-cm sand ditches at specified positions at equal intervals by using barrier plates according to design requirements, wherein the sand ditches are 30-50 cm lower than a roadbed;

B. inserting side baffles with the depth of 70-100cm into two sides of a road foundation treatment range, and then excavating drainage ditches and water collection wells on the outer sides of the side baffles;

C. digging backfill ditches with the same depth between two adjacent groups of partition plates, then backfilling rubbles in each section of backfill ditch, burying filter pipes in the sand ditches, and then backfilling medium-coarse sand reverse filter layers in the sand ditches;

D. and finally, removing all the blocking plates, introducing rubble and underground water in the sand ditch into the drainage ditch and the water collecting well through the water filter pipes for discharging, backfilling and solidifying the outer sides of the side baffles at the two sides after the drainage is finished, and then removing the side baffles.

According to a further preferred scheme, the blocking plate comprises a plurality of socket parts and connecting parts, first connecting grooves are formed in the two sides of the socket parts, and two connecting protrusions matched with the first connecting grooves are arranged on the connecting parts.

In a further preferable scheme, a second connecting groove matched with the connecting part and a mounting opening matched with the strainer are formed in the side baffle, and the bottom of the mounting opening is a guide groove in a conical structure.

According to a further preferable scheme, the two ends of the water filter pipes are respectively matched with the mounting openings through the guide grooves and penetrate through the side baffles at the two ends, the water filter pipes of the outer leakage side baffle are cut off through cutting equipment before the side baffles are detached, and then the cut water filter pipes are pushed to be slightly arched inwards to be separated from the side baffles through upward detaching the side baffles.

In a further preferred scheme, the strainer is provided with two sections, the joint of the two sections of strainers is connected with a connecting structure, and the height of the strainer on the two sides of the position height of the connecting structure is higher than that of the strainer.

Further preferred scheme, connection structure includes first fixed block and second fixed block and connects the steel hoop of first fixed block and second fixed block, all be equipped with connector and connector department on first fixed block and the second fixed block and be equipped with the sealing member, the cavity has all been seted up at the relative one side middle part of first mounting and second mounting, two the inside slip of cavity is equipped with first slider and second slider, first slider and second slider respectively with the tip fixed connection of the strainer that corresponds, first mounting and second mounting are equipped with joint strip.

Further preferably, a return spring is arranged between the first sliding block and the corresponding connecting port, and the return spring is sleeved outside the strainer.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the rubble sand ditch treatment is adopted, so that the immersion of underground water can be reduced, the occurrence of springs in rubble replacement and filling treatment is avoided, and the stability of rubble replacement and filling is ensured. The mode is safe and reliable, simple to operate, and the quality is guaranteed, and the cost of precipitation can be greatly reduced. The rubble is adopted to treat the roadbed, and in order to reduce the influence of underground water on rubble replacement and filling, a sand ditch and a water filter pipe are additionally arranged according to a rubble treatment section, so that the disturbance of the underground water on the rubble is reduced, and the overall stability of rubble replacement and filling treatment is ensured.

Drawings

Fig. 1 is a plan view of a roadbed filling processing according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a roadbed backfill processing in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view showing a connection structure of the socket part and the connection part according to the present invention;

FIG. 4 is a schematic view showing a connection structure of the socket part, the connection part and the side barrier according to the present invention;

FIG. 5 is an inside view of the side dam of the present invention;

FIG. 6 is a schematic view of the connection structure of the middle part of the water filtering pipe in the sand trench;

fig. 7 is a schematic view of the overall structure of the first fixing block and the second fixing block in the present invention.

In the figure: 1. rubble; 2. a medium coarse sand reverse filtering layer; 3. a water filter pipe; 31. a first fixed block; 32. a second fixed block; 33. a steel hoop; 34. a second slider; 35. a return spring; 36. a first slider; 4. a barrier plate; 41. a socket part; 42. a connecting portion; 43. connecting a first connecting groove; 44. a connecting projection; 5. a side dam; 51. connecting groove two; 52. and (7) installing the opening.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example (b):

as shown in fig. 1 to 7, a construction method for soft roadbed treatment includes the following steps:

A. firstly, excavating all earthwork of a filling and changing treatment section, and excavating sand ditches with the width of 200cm at regular intervals by using a barrier plate 4 according to design requirements, wherein the sand ditches are 40cm lower than a roadbed;

B. inserting side baffles 5 with the depth of 80cm into two sides of a road foundation treatment range, and then excavating drainage ditches and water collection wells outside the side baffles 5;

C. digging backfill ditches with the same depth between two adjacent groups of partition plates, then backfilling rubbles 1 in each section of backfill ditch, burying water filter pipes 3 in the sand ditches, and then backfilling medium-coarse sand reverse filter layers 2 in the sand ditches;

D. and finally, removing all the blocking plates 4, introducing the rubble 1 and the underground water in the sand ditch into a drainage ditch and a water collecting well through the water filter pipes 3 for discharging, backfilling the outer sides of the side baffles 5 at the two sides to solidify sludge after the drainage work is finished, and then removing the side baffles 5.

In a further preferable scheme in this embodiment, the blocking plate 4 includes a plurality of socket parts 41 and a connecting part 42, two sides of the socket part 41 are both provided with a first connecting groove 43, and the connecting part 42 is provided with two connecting protrusions 44 adapted to the first connecting groove 43. The connection of the plurality of socket parts 41 into a whole is realized through the matching of the connecting bulge 44 on the connecting part 42 and the first connecting groove 43 on the socket part 41, finally, the blocking plate 4 is integrally installed, the sand ditch and the backfill ditch are separated, the sand ditch and the backfill ditch are temporarily separated, and the blocking plate and the backfill ditch are respectively backfilled and then pulled out to realize the communication of underground water, so that the backfilling is realized more efficiently, and meanwhile, the effective drainage can be realized.

In a further preferable embodiment of the present invention, the side baffle 5 is provided with a second connecting groove 51 adapted to the connecting portion 42 and an installing opening 52 adapted to the strainer 3, and a bottom of the installing opening 52 is a guide groove with a tapered structure. Utilize the second 51 of spread groove on the side shield 5 to realize being connected with baffler 4, can carry out the drainage with strainer 3 and installing port 52 adaptation when the installation simultaneously, can realize the separation with cutting back strainer 3 through the guide way of toper structure when side shield 5 is demolishd to needs, the extraction of side shield 5 of being convenient for.

In a further preferred embodiment of the present invention, two ends of the water filter pipes 3 are respectively fitted to the mounting openings 52 through guide grooves and pass through the side baffles 5 at the two ends, the water filter pipes 3 of the outer leakage side baffle 5 are cut off by a cutting device before the side baffles 5 are removed, and then the cut water filter pipes 3 are pushed by removing the side baffles 5 upwards to be slightly arched inwards to be separated from the side baffles 5.

In a further preferred aspect of the present embodiment, the strainer 3 has two sections, a connection structure is connected to a joint of the two sections of strainers 3, and the height of the strainer 3 on both sides of the height of the connection structure realizes an effective drainage effect by using the height of the middle portion.

In a further preferable scheme in this embodiment, the connection structure includes a first fixed block 31, a second fixed block 32, and a steel hoop 33 connecting the first fixed block 31 and the second fixed block 32, the first fixed block 31 and the second fixed block 32 are symmetrically arranged and have the same structure, the first fixed block 31 and the second fixed block 32 are both provided with a connector, and a sealing member is arranged at the connector, the middle of one side of the first fixed block 31 opposite to the second fixed block 32 is provided with a cavity, two cavities are internally provided with a first slider 36 and a second slider 34 in a sliding manner, the first slider 36 and the second slider 34 are respectively fixedly connected with the end portions of the corresponding water filter pipes 3, and the first fixed block 31 and the second fixed block 32 are provided with sealing rubber strips. The first fixing block 31 and the second fixing block 32 on the two sides are fixed on the outer side of the strainer 3 through the hoop body 33 and are respectively and fixedly connected to the strainer 3 through the first sliding block 36 and the second sliding block 34, so that the side baffle 5 is convenient to remove.

In a further preferable mode of this embodiment, a return spring 35 is disposed between the first slider 36 and the second slider 34 and the corresponding connection port, and the return spring 35 is sleeved on the outer side of the water filter tube 3. The first slider 36 and the second slider 34 can be automatically reset by the reset spring 35, so that the reset effect of the filter pipe 3 after the side baffle 5 is pulled out is realized.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitution may be of partial structures, devices, method steps, or may be a complete solution. The technical solution and the inventive concept thereof according to the present invention should be equally replaced or changed within the protection scope of the present invention.

Claims

1. A construction method for soft roadbed treatment is characterized by comprising the following steps:

A. firstly, excavating all earthwork of a replacement and filling treatment section, and excavating 180-cm sand ditches at specified positions at equal intervals by using barrier plates (4) according to design requirements, wherein the sand ditches are 30-50 cm lower than a roadbed;

B. inserting side baffles (5) with the depth of 70-100cm into two sides of a road foundation treatment range, and then excavating drainage ditches and water collection wells on the outer sides of the side baffles (5);

C. digging backfill ditches with the same depth between two adjacent groups of partition plates, then backfilling rubbles (1) in each section of backfill ditch, burying filter pipes (3) in the sand ditches, and then backfilling medium-coarse sand reverse filter layers (2) in the sand ditches;

D. and finally, removing all the blocking plates (4), introducing the rubble (1) and the underground water in the sand ditch into a drainage ditch and a water collecting well through the water filter pipes (3) for discharging, backfilling the outer sides of the side baffles (5) at the two sides to solidify sludge after the drainage is finished, and then removing the side baffles (5).

2. The construction method for treating the soft subgrade according to the claim 1, characterized in that the baffle plate (4) comprises a plurality of socket parts (41) and connecting parts (42), wherein the socket parts (41) are provided with a first connecting groove (43) on both sides, and the connecting parts (42) are provided with two connecting bulges (44) matched with the first connecting groove (43).

3. The construction method for treating the soft subgrade according to the claim 2, characterized in that the side baffle (5) is provided with a second connecting groove (51) matched with the connecting part (42) and a mounting opening (52) matched with the water filter pipe (3), and the bottom of the mounting opening (52) is a guide groove with a conical structure.

4. A construction method for a soft roadbed according to claim 3, wherein both ends of the strainer (3) are respectively fitted with the mounting holes (52) through guide grooves and pass through the side baffles (5) at both ends, the strainer (3) of the outer leakage side baffle (5) is cut off by a cutting device before the side baffles (5) are removed, and then the cut strainer (3) is pushed by removing the side baffles (5) upwards to be slightly arched inwards to be separated from the side baffles (5).

5. The construction method for the soft roadbed treatment according to claim 1, wherein the strainer (3) is provided with two sections, the joint of the two sections of the strainer (3) is connected with a connecting structure, and the height of the strainer (3) on two sides of the position height of the connecting structure is higher.

6. The construction method for treating the soft roadbed according to claim 5, wherein the connecting structure comprises a first fixing block (31), a second fixing block (32) and a steel hoop (33) for connecting the first fixing block (31) and the second fixing block (32), connectors are arranged on the first fixing block (31) and the second fixing block (32), sealing elements are arranged at the connectors, cavities are formed in the middle of one opposite side of the first fixing block (31) and the second fixing block (32), a first sliding block (36) and a second sliding block (34) are arranged in the two cavities in a sliding mode, the first sliding block (36) and the second sliding block (34) are fixedly connected with the end portions of the corresponding water filtering pipes (3), and sealing rubber strips are arranged on the first fixing block (31) and the second fixing block (32).

7. The construction method for treating the soft subgrade according to the claim 1, characterized in that a return spring (35) is arranged between the first sliding block (36) and the second sliding block (34) and the corresponding connecting port, and the return spring (35) is sleeved on the outer side of the water filter pipe (3).