A curing roadbed auxiliary workpiece applicable to soft foundation soil and its application

Abstract

The present invention relates to a curing roadbed auxiliary workpiece applicable to soft foundation soil and its application. Two parallel vertical templates are set as unit components, and assembly adapters are respectively set, and detachable support frames are arranged on their outer sides. During construction, after laying a drainage cushion layer, an adjustable number of vertical templates and support frames are installed, slurry with a high water content is injected, and after standing, drainage is carried out until the water content of the slurry drops to the target value and then curing is carried out. After the curing is completed, the vertical templates are pulled out and recovered, and the embankment slope is filled to obtain a complete roadbed. The present invention does not require the construction of a slurry pond, saves land, and can effectively increase the preloading period of the foundation; the process is less, the control is simple, and it is a construction method that can better balance the construction period and the project quality; compared with the rolling-type solidified soil roadbed control method, it has a simple control method, good dehydration effect, short construction period, and is less affected by weather factors; the vertical templates have a high degree of standardization, and the transportation cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of construction or surfacing of roads, stadiums or similar projects, and machinery and auxiliary tools for construction and repair, and particularly relates to a curing subgrade auxiliary workpiece applicable to soft foundation soil and its application. Background Art

[0002] Dredged slurry has poor engineering properties due to extremely high water content, rich in organic matter and pollutants. It is usually difficult to be directly utilized in projects. If traditional methods such as marine dumping, land stacking or landfill are used for disposal, not only a large amount of land resources will be occupied, but also secondary pollution is easily caused, leading to a series of ecological and environmental problems. On the other hand, due to the increasing scale of road engineering construction year by year, the demand for subgrade fillers is huge. However, high-quality fillers such as sand and gravel can only be obtained by methods such as riverbed sand mining and quarrying, which damage the original natural ecological environment and the sand and gravel resources are becoming increasingly scarce.

[0003] Utilizing dredged slurry as a subgrade filler after solidification treatment is an important way to solve the above problems. It has the advantages of large treatment capacity and short treatment time. It can not only consume a huge amount of dredged slurry, but also solve the problem of shortage of subgrade fillers for road engineering, realizing the resource utilization of dredged slurry, which is of great significance to environmental protection and ecological civilization construction.

[0004] In the prior art, for the technology of using fluidized solidified soil for embankment pouring, high-water-content slurry is injected into a pre-built slurry pool, and a solidifying agent is added. After it becomes fluidized solidified soil that meets the requirements, embankment pouring is carried out. There are problems of complex previous works and high land use requirements. At the same time, due to the extremely high water content of dredged slurry, although the water content decreases after dehydration, solidification and material piling, according to the current subgrade filler test and detection methods, it takes a long time for solidification reaction to reach the optimal water content, and complex processes such as spreading and sunning are required. The construction period is long, the construction processes are numerous, difficult to control, the cost is high, the construction period is significantly affected by the weather, and dust pollution is easily caused. More importantly, compared with the original solidified soil, the strength of the reshaped solidified soil after crushing and re-rolling is greatly reduced. Summary of the Invention

[0005] The present invention solves the problems existing in the prior art, and provides an optimized curing subgrade auxiliary workpiece applicable to soft foundation soil and its application, which is particularly applicable to the rapid filling of dams in highway engineering or the construction of embankments near dredged slurry storage yards, making up for the deficiencies of traditional rolled solidified soil subgrades that are easily affected by the weather, have cumbersome processes and long construction periods, can significantly shorten the construction period, and can reduce the slope angle and the amount of earthwork.

[0006] The technical solution adopted by the present invention is a curing roadbed auxiliary workpiece suitable for soft foundation soil. The auxiliary workpiece includes two vertical templates arranged side by side, and a detachable support frame is provided on the outer side of any one of the vertical templates, and assembling adapters are respectively provided for the two vertical templates.

[0007] Preferably, the two vertical templates are connected by a hinge, and a damper is provided in cooperation with the hinge; waterproof layers are provided on the inner sides of the two vertical templates corresponding to the hinge.

[0008] Preferably, a slot is provided on the outer side of any one of the vertical templates; the support frame includes a first steel bar detachably assembled with any one of the slots, the top and bottom of the first steel bar are respectively connected to the upper and lower parts of a positioning steel pipe through a second steel bar and a third steel bar; a limiting member is provided between the first steel bar and the slot.

[0009] Preferably, a positioning steel bar is inserted through the positioning steel pipe.

[0010] Preferably, the horizontal height of one end of the second steel bar facing the slot is greater than that of the other end.

[0011] Preferably, the assembling adapters include step grooves and adjustable adapter blocks respectively provided on both sides of the two vertical templates. The step grooves are provided on the inner sides of the vertical templates, and the adjustable adapter blocks are hinged to the corresponding vertical templates; a sealing member is provided in cooperation between the step grooves and the adjustable adapter blocks.

[0012] Preferably, a number of drain holes are provided in cooperation with any one of the vertical templates, and a drain valve is provided in cooperation with any one of the drain holes.

[0013] Preferably, a vacuum pump is detachably provided corresponding to any one of the drain valves.

[0014] Preferably, a number of insertion holes are provided in the upper part of any one of the vertical templates, and a plug pin is detachably provided in cooperation with any one of the insertion holes.

[0015] An application of the curing roadbed auxiliary workpiece suitable for soft foundation soil described above, the application includes the following steps:

[0016] Step 1: Lay a drainage cushion layer with a preset thickness within the sidelines marked at the construction site, compact the gravel soil to meet the preset requirements; plan the number and folding state of the auxiliary workpieces;

[0017] Step 2: Control the verticality of the vertical template, insert the planned vertical template into the foundation soil to a preset depth and fit it with the drainage cushion layer; insert the support frame into the slot of the vertical template, insert the positioning steel bar into the positioning steel pipe of the support frame and drill it into the soil to a preset depth, and fix the support frame so that it no longer rotates;

[0018] Step 3: Inject slurry with high water content into the cavity formed in situ by the vertical formwork. After standing, open the drain valve, and use a vacuum pump in conjunction with the drain valve to pump water outwards. At the same time, monitor the change in the water content of the slurry in the cavity;

[0019] Step 4: After the water content drops to the target value, add a curing agent to the slurry, and use a stirring device to fully stir the slurry and the curing agent until the subgrade strength reaches the preset requirements;

[0020] Step 5: Install a plug-in pin in the socket on the upper part of the vertical formwork, and use a lifting device to act on the plug-in pin to pull out and recover the vertical formwork;

[0021] Step 6: Set up formwork on both sides of the formed subgrade body, and use the form of pouring fluidized solidified soil to fill the embankment slopes to obtain a complete subgrade.

[0022] The present invention relates to an optimized curing subgrade auxiliary workpiece applicable to soft foundation soil and its application. Two vertically arranged vertical formworks are used as unit components for various assembly methods. Removable support frames are arranged on the outer side surfaces of the vertical formworks, and assembly adapters are respectively arranged in cooperation with the two vertical formworks; during construction, first lay a drainage cushion with a preset thickness as part of the drainage mechanism, then install an adjustable number of vertical formworks and support frames, inject slurry with high water content into the cavity formed in situ by the vertical formworks, drain water after standing until the water content of the slurry drops to the target value and then cure it. After curing, pull out and recover the vertical formworks, and finally fill the embankment slopes to obtain a complete subgrade.

[0023] The beneficial effects of the present invention are as follows:

[0024] (1) The slurry can be directly injected into the cavity formed by connecting the heads and tails of several vertical formworks, eliminating the need to build a slurry pond, saving land and effectively increasing the preloading period of the foundation;

[0025] (2) It has fewer processes and simple control, and is a construction method that can better balance the construction period and project quality;

[0026] (3) Compared with the control method of the rolled solidified soil subgrade, it has simple control, good dehydration effect, short construction period, and little influence by weather factors;

[0027] (4) The vertical formwork has a high degree of standardization, and the transportation cost is greatly reduced. Description of the Drawings

[0028] Figure 1 It is a front view structural schematic diagram of the auxiliary workpiece of the present invention with the support frame removed;

[0029] Figure 2 It is a rear view structural schematic diagram of the auxiliary workpiece of the present invention;

[0030] Figure 3 Schematic structural diagram of the vertical formwork after folding according to the present invention;

[0031] Figure 4 Schematic structural diagram of the cooperation of two auxiliary workpieces according to the present invention;

[0032] Figure 5 Schematic structural diagram of the cooperation between the support frame and the vertical formwork according to the present invention;

[0033] Figure 6 Flow chart of the construction method according to the present invention. Detailed implementation manners

[0034] The present invention will be further described in detail below in conjunction with embodiments, but the protection scope of the present invention is not limited thereto.

[0035] As shown in the figure, the present invention relates to a curing roadbed auxiliary workpiece applicable to soft foundation soil. The auxiliary workpiece includes two vertical formworks 1 arranged in parallel. A detachable support frame is provided on the outer side of any one of the vertical formworks 1, and assembly adapters are respectively provided for the two vertical formworks 1.

[0036] In the present invention, several vertical formworks 1 are surrounded to form an open cavity into which slurry can be injected. By injecting high-moisture-content slurry into the cavity formed in situ in the vertical formworks 1 and draining water at the same time, after the moisture content of the slurry drops to the target value, a curing agent including but not limited to cement and lime is added to the slurry, and after in-situ mixing with a mixing device 18, a cured road embankment in this area can be formed.

[0037] In the present invention, the detachable support frame is used to fix the vertical formwork 1 in place; a detachable support frame is provided for each vertical formwork 1, further realizing the stability of the vertical formwork under working conditions of different widths.

[0038] In the present invention, the assembly adapters are used to realize the folding adaptation of the two vertical formworks 1 (the same auxiliary workpiece) and the splicing adaptation of the two vertical formworks 1 (different auxiliary workpieces).

[0039] In the present invention, the vertical formwork 1 can be made of ordinary carbon steel or stainless steel.

[0040] The two vertical formworks 1 are connected by a hinge 2, and a damper is provided in cooperation with the hinge 2; waterproof layers (not shown in the figure) are provided on the inner sides of the two vertical formworks corresponding to the hinge 2.

[0041] In the present invention, specifically, for the convenience of transportation and to meet the production of standard parts, two vertical templates 1 of each auxiliary workpiece are connected by a hinge 2. This enables the auxiliary workpiece to be in an unfolded state or a folded state during application, so as to adapt to sites of different sizes, reduce transportation costs and production costs, and have a higher degree of standardization.

[0042] In the present invention, it is only necessary to connect two vertical templates 1 by a hinge 2. In order to ensure the basic stability of its state during transportation, opening and closing, and application, a damper (not shown in the figure) is provided in cooperation with the hinge 2. The damper is also a damping member, which is easily understood by those skilled in the art. Those skilled in the art can set it according to actual situations, but a damper that is not easily corroded during application is better.

[0043] In the present invention, for the convenience of subsequent drainage operations, a waterproof layer is provided on the inner sides of the two vertical templates 1. The waterproof layer is a flexible material layer including but not limited to rubber, silica gel, waterproof film, etc.

[0044] A slot 3 is provided on the outer side of any one of the vertical templates 1; the support frame includes a first steel bar 4 detachably assembled with any one of the slots 3. The top and bottom of the first steel bar 4 are respectively connected to the upper and lower parts of a positioning steel pipe 7 through a second steel bar 5 and a third steel bar 6; a limiting member is provided between the first steel bar 4 and the slot 3.

[0045] A positioning steel bar 8 is inserted through the positioning steel pipe 7.

[0046] The horizontal height of one end of the second steel bar 5 facing the slot 3 is greater than that of the other end.

[0047] In the present invention, the overall shape of the support frame is trapezoidal. Specifically, it is composed of a combination of steel bars and steel pipes to form a right trapezoidal shape.

[0048] In the present invention, the hinge connection between the support frame and the vertical template 1 is completed by the slot 3 and the first steel bar 4. That is, during use, the first steel bar 4 is inserted into the slot 3 from top to bottom and rotated until the support frame and the vertical template 1 form a 90-degree angle, so that the support frame can be used for support. When not in use, the first steel bar 4 can be pulled out to complete storage respectively, which is convenient for transportation and unified production as a standard part; a limiting member is provided in cooperation with the first steel bar 4 and the slot 3. For example, a protrusion 9 is provided at a preset position of the first steel bar 4, and an adjustable limiting buckle 10 is provided in cooperation with the slot 3. The limiting buckle 10 is detachable and arranged on the protrusion 9, which can prevent the support frame from sliding out upwards; the structure of the limiting member is easily understood by those skilled in the art. Those skilled in the art can set it according to requirements, as long as it is ensured that the position of the support frame in the vertical direction is basically fixed after the support frame is inserted into the slot 3.

[0049] In the present invention, the first steel bar 4, the second steel bar 5, the third steel bar 6 and the positioning steel pipe 7 are actually integrated. To increase their strength, the whole is trapezoidal, that is, the horizontal height of the end of the second steel bar 5 facing the slot 3 is greater than the other end; during use, the positioning steel pipe 7 is positioned on the ground.

[0050] In the present invention, in order to further increase the support strength of the support frame, a positioning steel bar 8 is inserted into the positioning steel pipe 7 and can penetrate into the ground to a certain depth.

[0051] In the present invention, the positions of the slot 3 and the corresponding support frame are determined according to actual needs, that is, the auxiliary workpiece may have a variety of standard parts corresponding to different construction depths.

[0052] The assembled adapter includes a step groove 11 and an adjustable adapter block 12 respectively arranged on both sides of the two vertical templates 1. The step groove 11 is arranged on the inner side of the vertical template 1, and the adjustable adapter block 12 is hinged to the corresponding vertical template 1; a sealing member is cooperatively arranged between the step groove 11 and the adjustable adapter block 12.

[0053] In the present invention, since each auxiliary workpiece is composed of two vertical templates 1, on this basis, assembled adapters are provided for the two vertical templates 1 of the same auxiliary workpiece and for the two adjacent vertical templates 1 between different auxiliary workpieces; specifically, the step groove 11 and the adjustable adapter block 12 are respectively arranged on the opposite sides of the two vertical templates 1 of the same auxiliary workpiece, and at the same time, the adjustable adapter block 12 is hinged to the vertical template 1. The application scenarios are as follows:

[0054] For the two vertical templates 1 of the same auxiliary workpiece, before closing (folding) the two vertical templates 1, the adjustable adapter block 12 forms a 90° angle with the corresponding vertical template 1. After closing the two vertical templates 1, the adjustable adapter block 12 matches the step groove 11 of the other vertical template 1 of the same auxiliary workpiece.

[0055] For the two adjacent vertical templates 1 between different auxiliary workpieces, before adapting the two vertical templates 1, the adjustable adapter block 12 forms a certain angle with the corresponding vertical template 1, generally 90° - 180°. When splicing the two auxiliary workpieces, the adjustable adapter block 12 of the vertical template 1 of one auxiliary workpiece matches the step groove 11 of the vertical template 1 of the other auxiliary workpiece.

[0056] In the present invention, similarly, in order to ensure that its state is basically stable during transportation, opening and closing, and application, a damper is provided at the hinge joint between the adjustable adapter block 12 and the vertical template 1. Those skilled in the art can select specific dampers according to actual situations, but dampers that are not easily corroded in application are better.

[0057] In the present invention, in order to facilitate subsequent drainage operations, a seal is provided between the stepped groove 11 and the adjustable adapter block 12, and the seal includes but is not limited to a rubber block (pad).

[0058] A number of drainage holes 13 are provided in cooperation with any one of the vertical formworks 1, and a drainage valve 14 is provided in cooperation with any one of the drainage holes 13.

[0059] A vacuum pump 15 is detachably provided corresponding to any one of the drainage valves 14.

[0060] In the present invention, a number of drainage holes 13 for setting the drainage valve 14 are opened at a preset height from the bottom end of the vertical formwork 1. The drainage valve 14 can be set with a conventionally purchasable drainage valve 14, or two identical steel sheets with holes can be overlapped. The steel sheets are installed in advance before the vertical formwork 1 is inserted, made of materials such as stainless steel. At the same time, a drainage valve 14 switch control handle made of stainless steel is welded on the outer steel sheet. After the mud is injected and left to stand, the handle is rotated to make the holes of the two steel sheets coincide for drainage. After drainage is completed, the handle is rotated, and the drainage holes 13 are blocked by the adjacent steel sheets and no longer discharge water.

[0061] In the present invention, in cooperation with the pipeline of the vacuum pump 15, the pumping operation of the mud can be completed.

[0062] A number of jack holes 16 are provided in the upper part of any one of the vertical formworks 1, and a plug and pull pin 19 is detachably provided in cooperation with any one of the jack holes 16.

[0063] In the present invention, a number of jack holes 16 are opened in the upper part of the vertical formwork 1. After the subgrade construction is completed, a plug and pull pin 19 is set in the jack holes 16, and a lifting mechanism, such as a lifting rope, is set on all the plug and pull pins 19 for lifting to remove the vertical formwork 1.

[0064] The present invention also relates to an application of a curing subgrade auxiliary workpiece suitable for soft foundation soil, and the application includes the following steps:

[0065] Step 1: Lay a drainage cushion layer 17 with a preset thickness within the scope of the construction site sidelines, compact the gravel soil to meet the preset requirements; plan the number and folding state of the auxiliary workpieces;

[0066] In the present invention, the drainage cushion layer 17 generally uses well-graded gravel or sand cushion layer as the cushion layer of the cured soil embankment, and at the same time blocks the solid phase in the mud to facilitate mud dewatering.

[0067] Step 2: Control the verticality of the vertical formwork 1, insert the planned vertical formwork 1 into the foundation soil to a preset depth and fit it with the drainage cushion layer 17; insert a support frame into the slot 3 of the vertical formwork 1, insert a positioning steel bar 8 into the positioning steel pipe 7 of the support frame and drill it into the soil to a preset depth, and fix the support frame so that it no longer rotates, such as Figure 4a-1 in;

[0068] Step 3: Inject slurry with a high water content into the cavity constructed in-situ in the vertical formwork 1. After standing, open the drain valve 14, and use the vacuum pump 15 in cooperation with the drain valve 14 to pump water outwards, while monitoring the change in the water content of the slurry in the cavity. Such as Figure 4 a-2 in;

[0069] Step 4: After the water content drops to the target value, add a curing agent to the slurry, and use the mixing equipment 18 to fully mix the slurry and the curing agent until the subgrade strength reaches the preset requirements. Such as Figure 4 a-3 in; The curing agent includes but is not limited to cement and lime;

[0070] Step 5: Install the plug-in pin 19 in the socket 16 on the upper part of the vertical formwork 1, and apply a lifting device to the plug-in pin 19 to pull out and recover the vertical formwork 1. Such as Figure 4 a-4 in;

[0071] Step 6: Set up formwork on both sides of the formed subgrade body. Such as Figure 4 a-5 in, and use the form of pouring fluidized solidified soil to fill the embankment slope to obtain a complete subgrade. Such as Figure 4 a-6 in.

Claims

1. A curing roadbed auxiliary workpiece applicable to soft foundation soil, characterized in that: The auxiliary workpiece includes two vertically arranged templates, a detachable support frame is provided on the outer side of any one of the vertically arranged templates, and assembly adapters are respectively provided for the two vertically arranged templates; the assembly adapters include step grooves and adjustable adapter blocks respectively arranged on both sides of the two vertically arranged templates, the step grooves are arranged on the inner side of the vertically arranged templates, and the adjustable adapter blocks are hinged to the corresponding vertically arranged templates; a seal is provided between the step grooves and the adjustable adapter blocks; a plurality of jacks are provided on the upper part of any one of the vertically arranged templates, and a plug pin is detachably provided in any one of the jacks.

2. The curing roadbed auxiliary workpiece applicable to soft foundation soil according to claim 1, characterized in that: The two vertically arranged templates are connected by a hinge, and a damper is provided for the hinge; waterproof layers are provided on the inner sides of the two vertically arranged templates corresponding to the hinge.

3. The auxiliary workpiece for solidifying roadbed applicable to soft foundation soil according to claim 1, wherein: A slot is provided on the outer side of any one of the vertically arranged templates; the support frame includes a first steel bar detachably assembled with any one of the slots, the top and bottom of the first steel bar are respectively connected to the upper and lower parts of a positioning steel pipe through a second steel bar and a third steel bar; a limiting member is provided between the first steel bar and the slot.

4. The auxiliary workpiece for solidifying roadbed applicable to soft foundation soil according to claim 3, wherein: A positioning steel bar is inserted into the positioning steel pipe.

5. The auxiliary workpiece for solidifying a roadbed applicable to soft foundation soil according to claim 3, wherein: The horizontal height of one end of the second steel bar facing the slot is greater than that of the other end.

6. The solidified roadbed auxiliary workpiece applicable to soft foundation soil according to claim 1, characterized in that: A plurality of drain holes are provided for any one of the vertically arranged templates, and drain valves are provided for any one of the drain holes.

7. An auxiliary workpiece for solidifying a roadbed applicable to soft foundation soil according to claim 6, characterized in that: A vacuum pump is detachably provided corresponding to any one of the drain valves.

8. Application of a curing subgrade auxiliary workpiece for soft foundation soil according to any one of claims 1 to 7, characterized in that: The application includes the following steps: Step 1: Lay a drainage cushion layer with a preset thickness within the boundary lines drawn at the construction site, compact the gravel soil to meet the preset requirements; plan the number and folding state of the auxiliary workpieces. Step 2: Control the verticality of the vertically arranged templates, insert the planned vertically arranged templates into the foundation soil to a preset depth and fit them with the drainage cushion layer; insert the support frame into the slot of the vertically arranged template, insert the positioning steel bar into the positioning steel pipe of the support frame and drill it into the soil to a preset depth, and fix the support frame so that it no longer rotates. Step 3: Inject high-moisture-content slurry into the cavity formed in situ by the vertically arranged templates, open the drain valve after standing, use a vacuum pump in cooperation with the drain valve to pump water outwards, and simultaneously monitor the change in the moisture content of the slurry in the cavity. Step 4: After the moisture content drops to the target value, add a curing agent to the slurry, and use a stirring device to fully stir the slurry and the curing agent until the subgrade strength reaches the preset requirements. Step 5: Install a plug pin in the jack on the upper part of the vertically arranged template, and use a lifting device to act on the plug pin to pull out and recover the vertically arranged template. Step 6: Set up templates on both sides of the formed subgrade main body, and carry out the filling of the embankment slope in the form of pouring fluidized solidified soil to obtain a complete subgrade.

Images