Light assembly type filling retaining wall structure and construction method thereof

Abstract

The invention discloses a light assembly type filling retaining wall structure and a construction method thereof, and belongs to the technical field of geotechnical engineering. The retaining wall comprises a retaining wall body, the retaining wall body is formed by splicing a plurality of sets of plastic formworks, and limiting vertical circular steel beams and fixing square steel cross beams are arranged on the outer side of the retaining wall body; an inflatable sealing rubber pipe is arranged on the inner side of the retaining wall body. The construction cost is low, the work amount and the material consumption are low, the construction cost is remarkably reduced, the retaining wall body can be recycled, after a filling body is solidified, the plastic formwork, the limiting vertical circular steel beam and the fixing square steel beam are loosened through pressure relief and deflation of the inflatable sealing rubber pipe, and the construction efficiency is improved. Therefore, according to the retaining wall structure and the construction method thereof, rapid assembly of the filling retaining wall and repeated recycling of the main materials are achieved through low-strength field operation, cheap materials and a simple and convenient process.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical engineering, and more particularly to a light assembled filling retaining wall structure and a construction method thereof. Background Art

[0002] In the prior art, Chinese patent CN201310649829.X is "A retaining wall device for underground tailings cementation filling in mines". This patent discloses a retaining wall structure using "gabion boxes filled with excavated waste rock + geotextile / dewatering pipes". Compared with traditional retaining walls, this method is simple to construct, has good force-bearing performance and high safety. However, there are defects in actual use, such as long production cycle (the installation of the bottom dewatering pipe and the production and maintenance of the wall foundation exceed 12 hours, and the beams can only be removed one month after the filling is completed), high on-site labor intensity (the gabion box needs to be filled with more than ten cubic meters of waste rock on site, especially the upper filling can only be done manually, and the amount of gap filling is large), and many consumables lead to relatively complex processes (metal mesh, filter cloth dewatering pipe, concrete and cement mortar, etc.).

[0003] Chinese Patent CN201410658272.0-"A detachable filling retaining wall". The patent discloses a combination of multiple groups of sandbags and multiple fixings. The main defects are that there are many consumables and complex processes (prefabricated sandbags, four groups of fixing plates of different specifications, four groups of folding plates of different specifications, and multiple interlaced concrete pouring), high labor intensity (sandbag preparation and on-site stacking, installation of multiple groups of fixings, and on-site welding). The retaining wall is of poor quality and there are safety hazards after disassembly (after removing the fixings, the wall is full of bagged unbonded loose sand, and there are even cases where the sandbags are damaged. Although the retaining wall plays a role in sealing and dehydration in the early stage, it brings safety hazards of wall collapse to the site in the later stage).

[0004] Chinese patent CN202410580548.1-"A movable propulsion airbag steel structure filling retaining wall and construction method". This patent discloses a movable vehicle-mounted airbag as a filling retaining wall. Although it has the advantages of simple and fast process and less reusable consumables, it also has the disadvantages of high initial investment in the retaining wall and the need for a separate traction vehicle.

[0005] Chinese patent CN202010853378.1-"A novel detachable recycling filling retaining wall construction device and method" has the defects of large number of consumables, resulting in relatively complex process and high labor intensity.

[0006] In summary, the retaining wall structures in the prior art all have the problems of complex construction technology, great construction difficulty, long construction period, and high construction cost. Summary of the invention

[0007] 1. Technical problem to be solved by the invention

[0008] In view of the defects and shortcomings of the prior art, the present invention provides a light assembled filling retaining wall structure and a construction method thereof. The present invention has low cost, low engineering volume and material consumption, and significantly reduces the construction cost. The retaining wall body can be recycled, and after the filling body solidifies, the pressure is released and the air is released through an inflatable sealing hose to loosen and recycle the plastic formwork and the limiting vertical round steel beams and the fixed square steel beams. Therefore, a retaining wall structure and a construction method thereof are provided, which can realize rapid assembly of the filling retaining wall and repeated recycling of the main materials with low-intensity on-site operations, cheap materials and simple processes.

[0009] 2. Technical solution

[0010] In order to achieve the above object, the technical solution provided by the present invention is:

[0011] A light assembled filling retaining wall structure of the present invention comprises a retaining wall body, wherein the retaining wall body is formed by mutually splicing a plurality of sets of plastic formworks, and a limited vertical round steel beam and a fixed square steel beam are arranged on the outer side of the retaining wall body;

[0012] An inflatable sealing rubber hose is arranged on the inner side of the retaining wall body.

[0013] Furthermore, an observation port is provided on the upper portion of the retaining wall.

[0014] Furthermore, the limiting vertical round steel beam is arranged between the retaining wall and the fixed square steel beam, and the limiting vertical round steel beam and the fixed square steel beam are fixed with bolts or wires. The vertical round steel beam and the fixed square steel beam are connected to each other to form a "well" shaped structure.

[0015] Furthermore, the inflatable sealing hose is adhered to both ends of the inner side of the retaining wall from bottom to top.

[0016] Furthermore, the inflatable sealing hose is filled between the retaining wall and the surrounding rock of the tunnel. The inflatable sealing hose is in the shape of a long strip. The length of the inflatable sealing hose is consistent with the height of the retaining wall. In the working state, the two inflatable sealing hoses are inflated separately to achieve air inflation fixation and sealing of the retaining wall and the surrounding rock surface of the tunnel.

[0017] Furthermore, a tunnel support body is arranged inside the tunnel surrounding rock, the outer side of the retaining wall is the external connecting tunnel of the mine room, and the inner side of the retaining wall is the goaf area of ​​the mine room.

[0018] Furthermore, two vertical drill holes are respectively opened at the top and bottom of the external connecting tunnel of the mine room, with a hole depth of not less than 0.5m, and the upper and lower ends of the limiting vertical round steel beam are both placed in the vertical drill holes.

[0019] Furthermore, a limiting bottom groove is excavated at the bottom of the road entrance of the goaf of the mine room, the thickness and width of the limiting bottom groove are consistent with the specifications of the retaining wall, and the minimum depth of the limiting bottom groove is not less than 0.1m.

[0020] Furthermore, the plastic formwork is provided in multiple groups, and the multiple groups of plastic formwork are stacked horizontally block by block and vertically layer by layer from bottom to top to form a retaining wall body, and the multiple groups of plastic formwork are connected to each other by bolts.

[0021] A method for constructing a light assembled filling retaining wall structure, the construction procedure of which is as follows:

[0022] Step 1: Preparation stage: Preparation of materials, equipment and site. Prepare sufficient plastic formwork for retaining walls, limiting vertical round steel beams, fixed square steel beams and inflatable sealing hoses according to the measured tunnel area, and transport them to the site; arrange drilling rigs to dig vertical boreholes and limiting bottom trenches and clean up the site;

[0023] Step 2: Fix the bracket: Install two limited vertical round steel beams and fixed square steel beams to form a "well"-shaped structure as auxiliary fixed beams in the horizontal direction of the retaining wall;

[0024] Step 3: Retaining wall assembly: On site, plastic templates are stacked and linked "horizontally piece by piece and vertically layer by layer" from bottom to top to form the entire retaining wall section; two plastic templates are left empty in the middle and upper part of the retaining wall as the retaining wall observation port in the early stage of filling, and the observation port also serves as a drain port;

[0025] Step 4: Sealing and fixing: Paste the inflatable sealing hoses from bottom to top at both ends of the inner side of the retaining wall. After the retaining wall is installed in place, inflate the inflatable sealing hoses respectively to make the retaining wall and the surrounding rock surface of the tunnel expand and fix, and achieve sealing;

[0026] Step 5: Test the effect: temporarily cut out an area from the goaf of the mine to the mouth of the retaining wall, and inject water exceeding the height of the retaining wall to test its sealing effect;

[0027] Step 6: Material recovery: After the filling body in the goaf of the mine room solidifies, release the pressure and air through the inflatable sealing hose to loosen and recover the plastic formwork, inflatable sealing hose, limiting vertical round steel beams, and fixed square steel beams.

[0028] 3. Beneficial effects

[0029] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0030] The present invention has low cost, low engineering workload and material consumption, and significantly reduces construction costs. The retaining wall body can be recycled, and after the filling body is solidified, the pressure is released and the air is released through the inflatable sealing hose to loosen and recover the plastic formwork and the limiting vertical round steel beams and the fixed square steel beams. Therefore, a retaining wall structure and a construction method thereof are provided, which can realize rapid assembly of the filling retaining wall and repeated recycling of the main materials with low-intensity on-site operations, cheap materials and simple processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a front view of the present invention;

[0032] Figure 2 is a side view of the present invention;

[0033] Figure 3 A top view of the present invention;

[0034] Figure 4 It is a partial enlarged view of the present invention.

[0035] In the figure: 1. Tunnel surrounding rock; 2. Tunnel support body; 3. Observation port; 4. Plastic formwork; 5. Fixed square steel beam; 6. Limiting vertical round steel beam; 7. Limiting bottom trough; 8. Inflatable sealing hose; 9. External connecting tunnel of mine room; 91. Vertical drilling hole; 10. Retaining wall; 11. Mine goaf. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0037] Example 1

[0038] from Figure 1-4 It can be seen that a light assembled filling retaining wall structure of this embodiment includes a retaining wall body 10, which is formed by splicing multiple sets of plastic templates 4, and a limited vertical round steel beam 6 and a fixed square steel beam 5 are arranged on the outer side of the retaining wall body 10;

[0039] An inflatable sealing rubber hose 8 is arranged on the inner side of the retaining wall body 10 .

[0040] An observation port 3 is provided on the upper part of the retaining wall 10. Two templates are left empty on the upper part of the retaining wall 10 as the retaining wall observation port 3 and drain port in the early stage of filling, and the port is closed before the top filling operation.

[0041] A tunnel support body 2 is arranged inside the tunnel surrounding rock 1, the outer side of the retaining wall 10 is the external connecting tunnel 9 of the mine room, and the inner side of the retaining wall 10 is the goaf area 11 of the mine room.

[0042] Two vertical drill holes 91 are respectively opened at the top and bottom of the external connecting tunnel 9 of the mine room, with a hole depth of not less than 0.5m. The upper and lower ends of the limiting vertical round steel beam 6 are both inserted into the vertical drill holes 91, and the diameter of the limiting vertical round steel beam 6 corresponds to the aperture of the vertical drill hole 91.

[0043] A limiting bottom groove 7 is excavated at the bottom of the road crossing of the goaf 11 of the mine room. The thickness and width of the limiting bottom groove 7 are consistent with the specifications of the retaining wall 10, and the minimum depth of the limiting bottom groove 7 is not less than 0.1m.

[0044] There are multiple groups of plastic formworks 4, which are stacked horizontally and vertically from bottom to top to form a retaining wall 10, and the multiple groups of plastic formworks 4 are connected to each other by bolts.

[0045] The limiting vertical round steel beam 6 is arranged between the retaining wall 10 and the fixed square steel beam 5. The limiting vertical round steel beam 6 and the fixed square steel beam 5 are fixed with bolts or wires. The vertical round steel beam 6 and the fixed square steel beam 5 are interconnected to form a "well" shaped structure.

[0046] The inflatable sealing hose 8 is pasted on the two ends of the inner side of the retaining wall 10 from bottom to top; the inflatable sealing hose 8 is filled between the retaining wall 10 and the tunnel surrounding rock 1, and the inflatable sealing hose 8 is in the shape of a long strip, and the length of the inflatable sealing hose 8 is consistent with the height of the retaining wall 10. In the working state, the two inflatable sealing hoses 8 are inflated separately to achieve air fixation and sealing of the retaining wall 10 and the tunnel surrounding rock 1.

[0047] The production cycle of the present invention is shortened to within 0.5 days, the material recovery cycle is 0.5 days, and the process is simplified as follows, and only two people are required to work throughout the process;

[0048] Filling preparation: drilling holes and slotting → lowering columns and fixing horizontal steel → splicing retaining walls → installing sealing hoses and inflating and fixing;

[0049] Main material recovery: release air and pressure → loosen the formwork → remove the fixed beam.

[0050] The invention has low cost, low engineering and material consumption, and significantly reduces the construction cost. The retaining wall 10 can be recycled. After the filling body solidifies, the plastic formwork 4, the limiting vertical round steel beam 6 and the fixed square steel beam 5 are loosened and recovered through the inflatable sealing hose 8 to release pressure and deflate.

[0051] The invention provides a retaining wall structure and a construction method thereof, which can realize rapid assembly of a filling retaining wall and repeated recycling of main materials by low-intensity on-site operation, cheap materials and simple processes.

[0052] Example 2

[0053] from Figure 1-4It can be seen that the construction procedure of the light assembled filling retaining wall structure of this embodiment is as follows:

[0054] Step 1: Preparation stage: Materials, equipment and site preparation, prepare retaining wall plastic formwork 4, limiting vertical round steel beams 6, fixed square steel beams 5 and inflatable sealing hoses 8 according to the measured tunnel area, and transport them to the site; arrange a drilling rig to dig vertical boreholes 91 and limiting bottom grooves 7 and clean the site;

[0055] Step 2: Fixing the bracket: Install two limited vertical round steel beams 6 and fixed square steel beams 5 to form a "well"-shaped structure as auxiliary fixing beams in the horizontal direction of the retaining wall 10;

[0056] Step 3: Assembling the retaining wall 10: stacking and linking the plastic templates 4 from bottom to top "horizontally piece by piece and vertically layer by layer" on site to form a cross section of the entire retaining wall 10; leaving two plastic templates 4 in the upper middle part of the retaining wall 10 as the retaining wall observation port 3 for filling in the early stage, and the observation port 3 also serves as a drain port;

[0057] Step 4: Sealing and fixing: Paste the inflatable sealing hose 8 from bottom to top at both ends of the inner side of the retaining wall 10. After the retaining wall 10 is installed in place, inflate the inflatable sealing hose 8 respectively, so that the retaining wall 10 and the surrounding rock 1 of the tunnel are fixed and sealed;

[0058] Step 5: Test the effect: temporarily cut out an area from the goaf 11 of the mine room to the mouth 10 of the retaining wall, and inject water exceeding the height of the retaining wall 10 to test its sealing effect;

[0059] Step 6: Material recovery: After the filling body in the goaf 11 of the mine room solidifies, the plastic formwork 4, the inflatable sealing hose 8, the limiting vertical round steel beam 6, and the fixed square steel beam 5 are loosened and recovered by relieving pressure and air through the inflatable sealing hose 8.

[0060] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A light assembled filling retaining wall structure, comprising a retaining wall body (10), characterized in that: The retaining wall body (10) is formed by splicing a plurality of sets of plastic formworks (4) together, and a limited vertical round steel beam (6) and a fixed square steel beam (5) are arranged on the outer side of the retaining wall body (10); An inflatable sealing rubber hose (8) is arranged on the inner side of the retaining wall body (10).

2. A light assembled filling retaining wall structure according to claim 1, characterized in that: An observation port (3) is provided on the upper part of the retaining wall (10).

3. A light assembled filling retaining wall structure according to claim 1, characterized in that: The position-limiting vertical round steel beam (6) is arranged between the retaining wall (10) and the fixed square steel beam (5); the position-limiting vertical round steel beam (6) and the fixed square steel beam (5) are fixed by bolts or iron wires; the vertical round steel beam (6) and the fixed square steel beam (5) are connected to each other to form a "well"-shaped structure.

4. A light assembled filling retaining wall structure according to claim 1, characterized in that: The inflatable sealing rubber hose (8) is adhered to the two ends of the inner side of the retaining wall (10) from bottom to top.

5. A light assembled filling retaining wall structure according to claim 4, characterized in that: The inflatable sealing hose (8) is filled between the retaining wall (10) and the tunnel surrounding rock (1). The inflatable sealing hose (8) is in the shape of a long strip. The length of the inflatable sealing hose (8) is consistent with the height of the retaining wall (10). In the working state, the two inflatable sealing hoses (8) are inflated separately to achieve air expansion fixation and sealing of the retaining wall (10) and the tunnel surrounding rock (1).

6. The light assembled filling retaining wall structure according to claim 1, characterized in that: A tunnel support body (2) is arranged inside the tunnel surrounding rock (1), the outer side of the retaining wall (10) is the mine room external connecting tunnel (9), and the inner side of the retaining wall (10) is the mine room goaf (11).

7. A light assembled filling retaining wall structure according to claim 6, characterized in that: Two vertical boreholes (91) are respectively opened at the top and bottom of the external connecting tunnel (9) of the mine room, and the hole depth is not less than 0.5m. The upper and lower ends of the limiting vertical round steel beam (6) are both inserted into the vertical boreholes (91).

8. The light assembled filling retaining wall structure according to claim 6, characterized in that: A limiting bottom groove (7) is excavated at the bottom of the roadway of the mine goaf (11), the thickness and width of the limiting bottom groove (7) are consistent with the specifications of the retaining wall (10), and the minimum depth of the limiting bottom groove (7) is not less than 0.1m.

9. The light assembled filling retaining wall structure according to claim 1, characterized in that: The plastic formwork (4) is provided in multiple groups, and the multiple groups of plastic formwork (4) are stacked horizontally and vertically from bottom to top to form a retaining wall body (10), and the multiple groups of plastic formwork (4) are connected to each other by bolts.

10. The method for constructing a light assembled filling retaining wall structure according to claim 8, characterized in that: The construction procedure is: Step 1: Preparation stage: Materials, equipment and site preparation, prepare sufficient retaining wall plastic formwork (4), limiting vertical round steel beams (6), fixed square steel beams (5) and inflatable sealing hoses (8) according to the measured tunnel area, and transport them to the site; arrange a drilling rig to dig vertical boreholes (91) and limiting bottom grooves (7) and clean the site; Step 2: Fixing the bracket: Install two limited vertical round steel beams (6) and fixed square steel beams (5) to form a "well"-shaped structure as auxiliary fixing beams in the horizontal direction of the retaining wall (10); Step 3: Assembling the retaining wall (10): stacking and linking the plastic templates (4) from bottom to top "horizontally piece by piece and vertically layer by layer" on site to form a cross section of the entire retaining wall (10); leaving two plastic templates (4) in the upper middle part of the retaining wall (10) as the retaining wall observation port (3) for filling in the early stage, and the observation port (3) also serves as a drain port; Step 4: Sealing and fixing: sticking inflatable sealing rubber hoses (8) from bottom to top on both ends of the inner side of the retaining wall body (10); after the retaining wall body (10) is installed in place, inflating the inflatable sealing rubber hoses (8) respectively, so that the retaining wall body (10) and the surface of the tunnel surrounding rock (1) are expanded and fixed, and sealing is achieved; Step 5: Test the effect: temporarily cut out an area from the goaf (11) of the mine room to the mouth of the retaining wall (10), and inject water exceeding the height of the retaining wall (10) to test its sealing effect; Step 6: Material recovery: After the filling body in the goaf (11) of the mine room solidifies, the plastic formwork (4), the inflatable sealing hose (8), the limiting vertical round steel beam (6), and the fixed square steel beam (5) are loosened and recovered by relieving pressure and releasing air through the inflatable sealing hose (8).

Images