Roadbed repairing structure

Abstract

The utility model discloses a roadbed repairing structure which comprises a roadbed layer and a pavement layer arranged at the top of the roadbed layer, a settlement area is arranged at the top of the roadbed layer, a plurality of obliquely arranged precast piles are pre-buried in the roadbed layer, two precast piles which are opposite left and right are symmetrically arranged, each precast pile is of a hollow structure, and the settlement area is arranged at the top of the roadbed layer. The two ends of the precast pile are open, and a plurality of first pouring holes are formed in the inner wall of the precast pile. Through the arrangement of a series of structures, the bottom of the settlement area can be lifted and supported in an external extrusion force mode, the settlement area can be effectively repaired in cooperation with grouting supporting and peripheral supporting modes, the repairing effect is improved, in addition, the first pouring hole is blocked before grouting, and the construction efficiency is improved. And the situation that concrete enters the first pouring hole in the construction process can be effectively reduced, and follow-up grouting operation is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of subgrade repair structures, in particular to a subgrade repair structure. Background Technique

[0002] The subgrade refers to a strip-shaped structure that is constructed according to the route position and certain technical requirements as the pavement foundation. The subgrade is a structure that directly supports the track formed by filling or excavation, and is also called the lower structure of the line. It is the foundation of railways and highways. The subgrade is a linear structure made of soil or stone. From the perspective of materials, the subgrade can be divided into soil subgrade, stone subgrade, and soil-stone subgrade. Due to the influence of factors such as uneven subgrade filling materials, poor filling materials, and construction vibration, settlement and deformation are common problems of the subgrade. Subgrade settlement will inevitably lead to pavement damage and endanger traffic safety. Therefore, it is necessary to repair the subgrade. For this reason, application number: 201721648556.7 provides a subgrade repair structure, which belongs to the field of road construction. The subgrade repair structure includes a pavement layer and a roadbed layer. The pavement layer is located above the roadbed layer. The roadbed layer is provided with a first precast pile, a second precast pile, and a third precast pile. The first precast pile, the second precast pile, and the third precast pile are all arranged along the width direction of the roadbed layer. The third precast pile is basically horizontally arranged. The first precast pile and the second precast pile are both arranged above the third precast pile. The first precast pile and the second precast pile both include opposite first ends and second ends. The distance from the first end to the third precast pile is greater than the distance from the second end to the third precast pile. And the first ends of the first precast pile and the second precast pile are close to each other, and the second ends of the first precast pile and the second precast pile are far from each other. One end of the first precast pile, the second precast pile, and the third precast pile is provided with a feed port, and through holes are provided on the surface. It has a good repair effect on the subgrade.

[0003] For the subgrade repair structure disclosed in the above patent, it completes the repair of the subgrade by injecting slurry into the precast piles embedded in the subgrade and supporting and lifting the settlement area by the extrusion of the slurry. This repair method has the following deficiencies: 1. The repair effect is not ideal. Since the precast piles are embedded in the subgrade, the injected chemical slurry can only fill the holes and cannot effectively overflow through the holes to complete the support and lifting between the subgrade and the outer surface of the precast piles; 2. The precast piles are embedded in the subgrade. During the construction process, the concrete in the subgrade will block the holes on the precast piles in advance. Then, during the grouting process, the slurry cannot flow out effectively, thus affecting the repair effect and not meeting the use requirements. Considering the above situation, we have proposed a subgrade repair structure. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a subgrade repair structure.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A subgrade repair structure includes a subgrade layer and a pavement layer arranged on the top of the subgrade layer. A settlement area is provided on the top of the subgrade layer. A plurality of inclined precast piles are embedded in the subgrade layer. Two precast piles opposite to each other left and right are symmetrically arranged. The precast pile is a hollow structure, and both ends of the precast pile are open. A plurality of first pouring holes are formed in the inner wall of the precast pile, and the slurry inside the precast pile can flow out through the first pouring holes. A plugging mechanism matched with the corresponding plurality of first pouring holes is installed in the precast pile. The plugging mechanism is used to plug the first pouring holes. The tops of two precast piles opposite to each other left and right are fixedly connected with the same first extrusion mechanism. The first extrusion mechanism is used to extrude the bottom of the settlement area. The bottoms of a plurality of precast piles are movably contacted with the same second extrusion mechanism. The second extrusion mechanism is used to extrude a plurality of precast piles. A plurality of support mechanisms are inserted into the subgrade layer. The support mechanisms are located on the periphery of the settlement area. The support mechanisms are used to support the periphery of the settlement area.

[0007] Preferably, the plugging mechanism includes a plugging block movably sleeved in the precast pile. Rubber connecting strips are fixedly connected to the sides of two plugging blocks opposite to each other and close to each other. An elastic rubber block is movably sleeved in the first pouring hole. The elastic rubber block is provided to plug the first pouring hole. The side of the elastic rubber block close to the corresponding rubber connecting strip is fixedly connected with the rubber connecting strip. Pulling heads are fixedly connected to the sides of two plugging blocks opposite to each other and away from each other. The side of the pulling head away from the corresponding plugging block is flush with the outer side of the subgrade layer. The plugging block, the rubber connecting strip and the elastic rubber block can be pulled out from the inside of the precast pile in sequence through the pulling head.

[0008] Preferably, the first extrusion mechanism includes two extrusion blocks. The extrusion blocks are embedded in the subgrade layer and fixedly connected with the tops of the corresponding precast piles. An arc-shaped support elastic sheet is fixedly connected between two extrusion blocks opposite to each other left and right. When the poured slurry extrudes the arc-shaped support elastic sheet, the arc-shaped support elastic sheet deforms and extrudes the bottom of the settlement area.

[0009] Preferably, the second extrusion mechanism includes an extrusion pipe movably inserted into the subgrade layer. The outer side of the extrusion pipe is movably contacted with the bottoms of a plurality of precast piles. The extrusion pipe is a conical structure. An insertion pointed block is fixedly connected to the rear end of the extrusion pipe. A plurality of extrusion protrusions are fixedly connected to the outer side of the extrusion pipe. A plurality of second pouring holes are formed in the inner wall of the extrusion pipe. The extrusion protrusions are used to extrude the precast piles.

[0010] Preferably, the support mechanism includes support anchor pipes movably inserted into the road base layer. The rear end of the support anchor pipe is a conical plugging structure. A plurality of support blocks are fixedly connected to the outer side of the support anchor pipe. A plurality of third pouring holes are formed in the side wall of the support anchor pipe. The support anchor pipe and the support blocks cooperate to support the periphery of the settlement area.

[0011] Preferably, a plurality of extrusion pointed blocks are fixedly connected to the top of the precast pile. The extrusion pointed blocks are embedded in the road base layer. The arrangement of the extrusion pointed blocks is used to provide a force for extruding the road base layer when driving the precast pile to move by extrusion.

[0012] Preferably, a plurality of grooves are formed on both sides of the road base layer. The precast pile is located in the corresponding groove, and the pull head is located in the corresponding groove and does not contact the inner wall of the groove.

[0013] Compared with the existing technology, the beneficial effects of the present utility model are as follows:

[0014] 1. Through the arrangement of the plugging mechanism, the first pouring hole can be plugged during the construction of the road base layer, which can effectively reduce the situation that concrete enters the first pouring hole during the construction process, thus not affecting the subsequent grouting operation during the repair process;

[0015] 2. Through the cooperation of the first extrusion mechanism and the second extrusion mechanism, the bottom of the settlement area can be lifted by an external extrusion force, so that a gap is generated between the precast pile and the road base layer, so that more slurry can be poured. By the method of grouting after lifting, the bottom of the settlement area can be effectively supported, improving the repair effect;

[0016] 3. Through the arrangement of the support mechanism, the periphery of the settlement area can be supported after extrusion and lifting, and fixed with grouting, thereby further improving the repair effect;

[0017] Through the arrangement of a series of structures of the present utility model, the bottom of the settlement area can be lifted and supported by an external extrusion force. Combined with the grouting support and the peripheral support methods, the settlement area can be effectively repaired, improving the repair effect. In addition, by plugging the first pouring hole before grouting, the situation that concrete enters the first pouring hole during the construction process can be effectively reduced, without affecting the subsequent grouting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structure view of a roadbed repair structure proposed by the present utility model;

[0019] Figure 2 is Figure 1 the enlarged structure view of part A in

[0020] Figure 3Schematic left cross-sectional view of the second extrusion mechanism of a roadbed repair structure proposed by the present utility model;

[0021] Figure 4 Schematic left cross-sectional view of the support mechanism of a roadbed repair structure proposed by the present utility model.

[0022] In the figure: 100, roadbed layer; 101, road surface layer; 102, settlement area; 103, precast pile; 1, plugging block; 2, rubber connecting strip; 3, elastic rubber block; 4, extrusion tip block; 5, pull head; 6, first pouring hole; 7, extrusion block; 8, arc-shaped support spring piece; 9, extrusion pipe; 10, support anchor pipe; 11, insertion tip block; 12, second pouring hole; 13, extrusion protrusion; 14, support block; 15, third pouring hole. Specific implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] Refer to Figures 1-4A roadbed repair structure includes a roadbed 100 and a pavement layer 101 arranged on the top of the roadbed 100, a settlement area 102 is arranged on the top of the roadbed 100, a plurality of inclined precast piles 103 are pre-buried in the roadbed 100, two precast piles 103 opposite to each other are symmetrically arranged, the precast pile 103 is a hollow structure, wherein a plurality of extrusion tips 4 are fixedly connected to the top of the precast pile 103, the extrusion tips 4 are pre-buried in the roadbed 100, the extrusion tips 4 are arranged to provide a force for extruding the roadbed 100 when the extrusion drives the precast pile 103 to move, and both ends of the precast pile 103 are opened, a plurality of first casting holes 6 are opened on the inner wall of the precast pile 103, the mud inside the precast pile 103 can flow out through the first casting holes 6, and a blocking mechanism matched with the corresponding plurality of first casting holes 6 is installed in the precast pile 103, which The middle blocking mechanism includes a blocking block 1 movably sleeved in the precast pile 103, and the sides of the two opposite blocking blocks 1 on the left and right that are close to each other are fixedly connected with a rubber connecting strip 2, and an elastic rubber block 3 is movably sleeved in the first casting hole 6, and the setting of the elastic rubber block 3 is used to block the first casting hole 6, and the side of the elastic rubber block 3 close to the corresponding rubber connecting strip 2 is fixedly connected to the rubber connecting strip 2, and the sides of the two opposite blocking blocks 1 on the left and right that are away from each other are fixedly connected with a pull head 5, and the side of the pull head 5 away from the corresponding blocking block 1 is flush with the outer side of the roadbed 100, wherein a plurality of grooves are provided on both sides of the roadbed 100, and the precast pile 103 is located in the corresponding groove, and the pull head 5 is located in the corresponding groove and does not contact the inner wall of the groove, and the blocking block 1, the rubber connecting strip 2 and the elastic rubber block 3 can be pulled out from the inside of the precast pile 103 in sequence by the pull head 5;

[0025] The tops of the two precast piles 103 opposite to each other are fixedly connected with the same first extrusion mechanism, wherein the first extrusion mechanism includes two extrusion blocks 7, which are pre-buried in the roadbed 100 and fixedly connected to the tops of the corresponding precast piles 103, and an arc-shaped support spring piece 8 is fixedly connected between the two extrusion blocks 7 opposite to each other. When the injected mud extrudes the arc-shaped support spring piece 8, the arc-shaped support spring piece 8 is deformed and extrudes the bottom of the settlement area 102;

[0026] The bottoms of the plurality of precast piles 103 are in active contact with the same second extrusion mechanism, wherein the second extrusion mechanism comprises an extrusion tube 9 movably inserted into the roadbed 100, the outer side of the extrusion tube 9 is in active contact with the bottoms of the plurality of precast piles 103, the extrusion tube 9 is a conical structure, the rear end of the extrusion tube 9 is fixedly connected with an insertion tip block 11, the outer side of the extrusion tube 9 is fixedly connected with a plurality of extrusion protrusions 13, the inner wall of the extrusion tube 9 is provided with a plurality of second casting holes 12, and the extrusion protrusions 13 are used to extrude the precast piles 103;

[0027] A plurality of support mechanisms are inserted into the road base layer 100. The support mechanisms are located on the peripheral side of the settlement area 102. The support mechanism includes a support anchor pipe 10 movably inserted into the road base layer 100. The rear end of the support anchor pipe 10 is a conical plugging structure. A plurality of support blocks 14 are fixedly connected to the outer side of the support anchor pipe 10. A plurality of third pouring holes 15 are formed in the side wall of the support anchor pipe 10. The support anchor pipe 10 and the support blocks 14 cooperate to support the peripheral side of the settlement area 102. Both the support anchor pipe 10 and the extrusion pipe 9 are inserted into the road base layer 100 by external force during subsequent repair; through the setting of a series of structures, the present utility model can lift and support the bottom of the settlement area 102 by means of external extrusion force. Cooperating with the grouting support and the peripheral support methods, the settlement area 102 can be effectively repaired, and the repair effect can be improved. In addition, by plugging the first pouring hole 6 before grouting, the situation that concrete enters the first pouring hole 6 during the construction process can be effectively reduced, without affecting the subsequent grouting operation.

[0028] Working principle: During use, when constructing the road base layer 100, the precast pile 103 is pre-buried in the road base layer 100 in advance. When there is no settlement area 102, no repair is required. During the pre-burial process of the precast pile 103, the corresponding first pouring hole 6 is plugged by the elastic rubber block 3. Therefore, during the construction process of the road base layer 100, concrete will not enter the first pouring hole 6 for plugging, thus not affecting the grouting operation during the subsequent repair process;

[0029] When settlement area 102 appears and needs to be repaired, personnel use external tools to knock the extrusion pipe 9 into the road base layer 100, and the extrusion pipe 9 and the inserted tip block 11 are located below multiple precast piles 103. Since the extrusion pipe 9 is of a conical structure and there are multiple extrusion protrusions 13 on the outer side of the extrusion pipe 9, when the extrusion pipe 9 moves backward and is inserted into the road base layer 100, it will upwardly extrude the multiple precast piles 103. Under the extrusion force, the end of the precast pile 103 close to the extrusion pipe 9 rotates upward. While the precast pile 103 rotates upward, it drives the corresponding extrusion block 7 to move upward to upwardly extrude and lift the position of the settlement area 102. At the same time, the precast pile 103 drives the corresponding multiple extrusion tip blocks 4 to rotate upward. During the upward rotation of the precast pile 103, a gap is generated between its outer side and the road base layer 100. After the extrusion pipe 9 is completely inserted into the road base layer 100, multiple support anchor pipes 10 are knocked into the road base layer 100 and located on the periphery of the settlement area 102. At this time, the multiple support anchor pipes 10 support the periphery of the lifted settlement area 102. Immediately afterwards, slurry can be grouted into the extrusion pipe 9 and the support anchor pipes 10 through the ends of the extrusion pipe 9 and the support anchor pipes 10. The grouted slurry flows out into the road base layer 100 through the corresponding second pouring holes 12 and third pouring holes 15 respectively. After the slurry solidifies, the fixed connection between the extrusion pipe 9, the support anchor pipes 10 and the road base layer 100 can be realized;

[0030] At the same time, pull the corresponding plug block 1 in the direction away from the pull head 5. The plug block 1 drives multiple elastic rubber blocks 3 to move out of the first pouring hole 6 through the corresponding rubber connecting strips 2, so as to release the blockage of the precast pile 103 and the first pouring hole 6. Then slurry can be poured into the precast pile 103. The slurry inside the precast pile 103 flows out into the gap between the precast pile 103 and the road base layer 100 through the corresponding first pouring hole 6. At the same time, the slurry flows into the outer sides of the extrusion block 7 and the arc-shaped support elastic sheet 8 and generates an extrusion force. The extrusion force continues to extrude and support the bottom of the settlement area 102 to lift it. After the grouting is completed and the slurry solidifies, the fixed connection between the precast pile 103, the extrusion block 7 and the arc-shaped support elastic sheet 8 and the road base layer 100 can be completed. By means of external extrusion force to lift and grout for support and the way of peripheral support, the settlement area 102 can be effectively repaired and the repair effect can be improved.

[0031] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A roadbed repair structure, comprising a roadbed layer (100) and a pavement layer (101) arranged on the top of the roadbed layer (100), wherein a settlement area (102) is provided on the top of the roadbed layer (100), characterized in that: The roadbed (100) is pre-buried with a plurality of inclined precast piles (103), two precast piles (103) opposite to each other on the left and right are symmetrically arranged, the precast pile (103) is a hollow structure, and both ends of the precast pile (103) are opened, a plurality of first casting holes (6) are opened on the inner wall of the precast pile (103), and a blocking mechanism matched with the corresponding plurality of first casting holes (6) is installed in the precast pile (103), the tops of the two precast piles (103) opposite to each other on the left and right are fixedly connected with the same first extrusion mechanism, and the bottoms of the plurality of precast piles (103) are movably contacted with the same second extrusion mechanism, and a plurality of supporting mechanisms are inserted in the roadbed (100), and the supporting mechanisms are located on the peripheral side of the settlement area (102).

2. A roadbed repair structure according to claim 1, characterized in that: The blocking mechanism comprises a blocking block (1) movably sleeved in the precast pile (103); the sides of the two blocking blocks (1) opposite to each other are fixedly connected to a rubber connecting strip (2); an elastic rubber block (3) is movably sleeved in the first casting hole (6); the side of the elastic rubber block (3) close to the corresponding rubber connecting strip (2) is fixedly connected to the rubber connecting strip (2); the sides of the two blocking blocks (1) opposite to each other are fixedly connected to a pull head (5); the side of the pull head (5) away from the corresponding blocking block (1) is flush with the outer side of the roadbed (100).

3. A roadbed repair structure according to claim 2, characterized in that: The first extrusion mechanism comprises two extrusion blocks (7), the extrusion blocks (7) are pre-buried in the roadbed (100) and fixedly connected to the top of the corresponding prefabricated pile (103), and an arc-shaped supporting spring sheet (8) is fixedly connected between the two opposite extrusion blocks (7) on the left and right.

4. A roadbed repair structure according to claim 3, characterized in that: The second extrusion mechanism comprises an extrusion tube (9) movably inserted into the roadbed (100), the outer side of the extrusion tube (9) movably contacts the bottom of the plurality of precast piles (103), the extrusion tube (9) is a conical structure, the rear end of the extrusion tube (9) is fixedly connected to an insertion tip block (11), the outer side of the extrusion tube (9) is fixedly connected to a plurality of extrusion protrusions (13), and the inner wall of the extrusion tube (9) is provided with a plurality of second casting holes (12).

5. A roadbed repair structure according to claim 4, characterized in that: The support mechanism comprises a support anchor pipe (10) movably inserted into a roadbed (100); the rear end of the support anchor pipe (10) is a conical plugging structure; a plurality of support blocks (14) are fixedly connected to the outside of the support anchor pipe (10); and a plurality of third casting holes (15) are provided on the side wall of the support anchor pipe (10).

6. A roadbed repair structure according to claim 1, characterized in that: A plurality of extruded pointed blocks (4) are fixedly connected to the top of the prefabricated pile (103), and the extruded pointed blocks (4) are pre-buried in the roadbed (100).

7. A roadbed repair structure according to claim 2, characterized in that: A plurality of grooves are provided on both sides of the roadbed layer (100), the prefabricated piles (103) are located in the corresponding grooves, and the pull head (5) is located in the corresponding grooves and does not contact the inner wall of the grooves.

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