An emergency maintenance structure and method for an interface-type landslide highway

Abstract

The invention discloses an emergency maintenance and treatment structure and method for an interface-type landslide highway, and the method comprises the following steps: step 1: calculating the shear reinforcement of the pile foundation according to the thrust; step 2: closing the highway traffic at the landslide section, milling and excavating the road surface layer and the base layer of the highway at the landslide section, and locating the positions of the consolidation pile foundation and the non-consolidation pile foundation; step 3: drilling and pile foundation construction, and construction of the tie beam between the non-consolidation pile foundations; step 4: tying the steel skeleton of the raft slab, and pouring the raft slab concrete, realizing the consolidation of the consolidation pile foundation and the raft slab, and the non-consolidation pile foundation and the tie beam are supported at the bottom of the raft slab, and completing the construction of the first section treatment unit; repeating the above steps to carry out the construction of other treatment units; step 5: connecting the highway of the non-landslide section with the raft slab at the end of the landslide section through a slab, and carrying out the landslide treatment of the landslide section of the slope body. The present application can peel the highway at the landslide section from the slope body, so that the operating highway can be restored to traffic as soon as possible, greatly shortening the construction period.

Description

Technical Field

[0001] The invention relates to the technical field of geological disaster management, and in particular to an emergency maintenance and disposal structure and method for an interface-type landslide highway. Background Art

[0002] Interface landslide is a geological disaster phenomenon that is common throughout the world. The main cause of this type of geological disaster is the presence of permeable rock and soil and impermeable rock layers inside the slope. When the mechanical state of the rock and soil at the interface changes, the overlying rock and soil slides, and the slope is no longer stable. When there are structures such as roads on the unstable slope, it will cause serious safety hazards.

[0003] If it is a newly built highway, detours, large-span bridges, early slope cutting, and anti-slide piles can be used in the early stages of construction. At present, in the built highways, the conventional large-scale interface landslide control scheme mostly adopts closed traffic, and the landslide section adopts anti-slide piles with a spacing of 3-5m or micro piles with a spacing of 0.5cm. After the landslide control is completed, the landslide section needs to be re-treated with roadbed, and the road base and surface layers need to be constructed. All structures and methods require long-term traffic closures, and traffic can only be resumed after the slope is completely stable. When the dangerous highway is an operating highway, long-term traffic closures will cause serious social impacts and economic losses. As for the projects that have been implemented so far, there are no mature structures and construction methods that can guarantee the resumption of traffic on the operating highway in the short term. Summary of the invention

[0004] The present invention provides an interface-type landslide highway emergency maintenance and disposal structure and method, which can separate the highway from the slope at the landslide section, so that the operating highway can be restored to traffic as soon as possible, greatly shortening the construction period.

[0005] The technical problem to be solved is: currently landslide control requires long-term road closures, which will cause serious social impacts and economic losses.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides an emergency maintenance method for an interface landslide highway, comprising the following steps:

[0008] Step 1: Calculate the thrust of the landslide body at the pile foundation location based on the rock and soil conditions of the slope, and calculate the pile foundation shear reinforcement based on the thrust;

[0009] Step 2: Close the highway traffic at the landslide section, mill and dig out the road surface and base layer at the landslide section, locate the positions of the consolidation pile foundation and the non-consolidation pile foundation, where the consolidation pile foundation and the non-consolidation pile foundation are distributed in a plum blossom shape, and the non-consolidation pile foundation is set at both ends of the raft in the length direction;

[0010] Step 3: Drilling and pile foundation construction, and tie beam construction between unconsolidated pile foundations;

[0011] Step 4: The steel bars in the consolidation pile foundation penetrate into the raft to be cast, the steel skeleton of the raft is tied, and the raft concrete is cast to realize the consolidation of the consolidation pile foundation and the raft, and the non-consolidation pile foundation and tie beam are supported at the bottom of the raft, completing the construction of the first section of the disposal unit; repeat the above steps to carry out the construction of other disposal units;

[0012] Step 5: Connect the non-landslide section of the highway to the raft at the end of the landslide section through a slab to meet the traffic needs of the highway, lift the road closure, and carry out landslide control on the landslide section of the slope.

[0013] The present invention provides an emergency maintenance method for an interface-type landslide highway. Further, in step 1, the overall geological conditions of the slope are obtained through geological drilling to determine the type of landslide and the location of the sliding surface. At the same time, geotechnical tests are carried out based on soil samples to determine the cohesion and internal friction angle of the landslide body, and the thrust of the landslide body at the pile foundation position is calculated based on the rock and soil conditions.

[0014] The present invention provides an emergency maintenance method for an interface landslide highway. Further, in step 4, before the raft slab is constructed, a steel plate is laid on the bottom surface of the raft slab to be cast.

[0015] The invention discloses an emergency maintenance method for an interface landslide highway. Further, a displacement monitoring device is installed on the outer side of the raft.

[0016] The present invention provides an emergency maintenance method for an interface landslide highway. Further, in step 5, after the landslide section is treated, the empty part at the bottom of the raft is filled densely.

[0017] The invention discloses an interface type landslide highway emergency maintenance and treatment structure, comprising a slope, a highway arranged on the slope, and a treatment unit arranged at the landslide section of the slope, wherein the treatment unit is provided in multiple groups, and the multiple groups of the treatment units are connected to form a temporary road at the landslide section, and the two ends of the temporary road are connected to the highway at the non-landslide section through a slab;

[0018] The disposal unit comprises a raft, a consolidation pile foundation, a non-consolidation pile foundation and a tie beam, wherein the non-consolidation pile foundation is arranged at both ends of the raft in the length direction, the tie beam is connected between the non-consolidation pile foundations along the width direction of the raft, and the non-consolidation pile foundation and the tie beam are supported on the bottom surface of the raft;

[0019] The consolidation pile foundation is located between two groups of non-consolidation pile foundations, and its upper end is consolidated with the raft slab; the length ratio of the consolidation pile foundation and the non-consolidation pile foundation located at the upper and lower sections of the sliding interface is 1:0.8-1.

[0020] The present invention provides an interface type landslide highway emergency maintenance and disposal structure. Furthermore, an asphalt surface layer is laid on the raft slab.

[0021] The present invention provides an interface type landslide highway emergency maintenance and disposal structure. Further, a steel plate is provided on the bottom surface of the raft slab.

[0022] The invention provides an interface type landslide highway emergency maintenance and disposal structure. Further, the ends of two adjacent raft slabs are jointly supported on a group of non-consolidated pile foundations and tie beams.

[0023] The present invention provides an interface type landslide highway emergency maintenance and disposal structure. Furthermore, the consolidation pile foundation and the non-consolidation pile foundation are distributed in a plum blossom shape at the bottom of the raft slab.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. This application sets up a disposal structure at the landslide section to separate the highway at the rear edge of the landslide section from the geological disaster area. During the landslide treatment process, the road in the landslide section is not affected by the landslide, and can meet the needs of operating highway traffic in a very short time. After the landslide treatment is completed, only the empty part under the raft needs to be filled and compacted, avoiding re-paving of the road, greatly shortening the construction period and reducing construction investment;

[0026] 2. A combination of a consolidated pile foundation and a non-consolidated pile foundation is arranged at the bottom of the raft slab, and the ends of the raft slab are made to cooperate with the non-consolidated pile foundation to meet the requirements of the raft slab expansion and contraction and deformation while meeting the requirements of the supporting function;

[0027] 3. Distributing the consolidated pile foundation and the non-consolidated pile foundation in a plum blossom shape can reduce the number of pile foundations, shorten the construction period and reduce the construction cost while ensuring the supporting effect;

[0028] 4. By laying steel plates at the bottom of the raft to be cast, the number of pile foundations can be reduced, the construction period can be shortened and the construction cost can be reduced while ensuring the supporting effect;

[0029] 5. By installing displacement monitoring equipment on the raft, it is used to monitor whether the raft is displaced during the landslide process to ensure the safety of passage.

[0030] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A top view of the present invention;

[0032] Figure 2 It is a schematic diagram of the elevation structure of the disposal unit of the present invention;

[0033] Figure 3It is a schematic diagram of the planar structure of the disposal unit of the present invention.

[0034] Reference numerals:

[0035] 1. Slope; 2. Highway; 3. Treatment unit; 4. Slab; 5. Raft; 6. Consolidated pile foundation; 7. Unconsolidated pile foundation; 8. Tie beam; 9. Asphalt surface layer. DETAILED DESCRIPTION

[0036] like Figure 1-Figure 3 As shown, the present invention discloses an emergency maintenance and disposal structure and method for an interface-type landslide highway. The disposal structure is suitable for interface-type landslides and is located at the rear edge of the slope. It includes a slope, a highway arranged on the slope, and a disposal unit arranged at the landslide section of the slope. A plurality of disposal units are arranged, and the plurality of disposal units are connected to form a temporary road at the landslide section. Both ends of the temporary road are connected to the highway at the non-landslide section by means of a slab, wherein an asphalt surface layer is paved on the temporary road.

[0037] This application takes the example of each group of treatment units with a length of 30m. The treatment units include raft slabs, consolidated pile foundations, non-consolidated pile foundations and tie beams. The raft slab is a reinforced concrete structure, and the raft slab structure should be allowed to work with cracks to ensure that the raft slab does not undergo severe deformation when the lower part of the raft slab is empty after the slope slides, and does not affect the normal traffic on the highway. A steel plate is provided on the bottom of the raft slab, which is used as a bottom formwork to enable the raft slab concrete to be poured smoothly, to avoid the lower part of the raft slab being empty during the sliding of the slope, which makes it impossible to pour concrete.

[0038] Consolidation piles and non-consolidation piles are arranged at the bottom of the raft. The consolidation piles and non-consolidation piles are distributed in a plum blossom shape at the bottom of the raft. The length ratio of the consolidation piles and non-consolidation piles at the upper and lower sections of the sliding interface is 1:1-1:0.8. The non-consolidation piles are arranged at both ends of the raft in the length direction and supported at the bottom of the raft. The consolidation piles are fixedly connected to the raft. The tie beams are connected between the non-consolidation piles along the width direction of the raft. The top surface of the tie beams is close to the bottom of the raft to lift up the two ends of the raft. The ends of two adjacent rafts are jointly supported on a group of non-consolidation piles and tie beams.

[0039] Both the consolidated pile foundation and the non-consolidated pile foundation are reinforced concrete structures. The reinforcement ratio is controlled by the shear strength required by the pile foundation. They both include concrete, a steel skeleton and an acoustic detection pipe. The upper end of the steel skeleton of the consolidated pile foundation extends into the raft slab to achieve consolidation of the consolidated pile foundation and the raft slab.

[0040] I-beams are inserted into the consolidated pile foundation and the unconsolidated pile foundation to improve the shear resistance of the pile foundation.

[0041] A displacement monitoring device is set on the side of the raft. The displacement monitoring device can be a GNSS displacement monitoring device or other equipment with absolute coordinate monitoring function, which is used to monitor whether the raft is displaced during the landslide process to ensure the safety of passage.

[0042] Among them, in one embodiment of the present application, each group of disposal units is provided with four non-consolidated pile foundations, and the four non-consolidated pile foundations are divided into two pairs and are respectively arranged at the two ends of the raft slab, and four consolidation pile foundations are arranged, and the four consolidation pile foundations are distributed in a diamond shape in the middle of the raft slab. The present application adopts a diamond distribution for the consolidation pile foundation, which can reduce the number of pile foundations while ensuring the supporting effect, shorten the construction period and reduce the construction cost.

[0043] The disposal method includes the following steps:

[0044] First, the overall geological conditions of the slope are obtained through geological drilling to determine the type of landslide and the location of the sliding surface. At the same time, geotechnical tests are carried out based on soil samples to determine the cohesion and internal friction angle of the landslide. The thrust of the landslide at the pile foundation position is calculated based on the rock and soil conditions. The depth is selected to the sliding interface, and the shear reinforcement of the pile foundation is calculated based on the thrust. The steel ratio needs to meet the shear resistance requirements to ensure that the pile foundation is not sheared by the thrust of the landslide during operation.

[0045] Close the highway traffic at the landslide section, mill and excavate the road surface and base layer at the landslide section, locate the positions of the consolidated pile foundation and the non-consolidated pile foundation, where the consolidated pile foundation and the non-consolidated pile foundation are distributed in a plum blossom shape, the non-consolidated pile foundation is set at both ends of the raft slab in the length direction, drill holes and pile foundation construction, and construction of tie beams between non-consolidated pile foundations.

[0046] Steel plates are laid on the bottom of the raft to be cast, the steel bars in the consolidation pile foundation are penetrated into the raft to be cast, the raft steel skeleton is tied, and the raft concrete is poured. After completion, the above steps are repeated to carry out the construction of other treatment units, the asphalt surface layer is laid on the raft, and finally the highway in the non-landslide section is connected to the raft at the end of the treatment structure through a slab to meet the traffic needs. The road is open to traffic and landslide control is carried out in the landslide section.

[0047] After the landslide control is completed, the empty part at the bottom of the raft slab can be filled tightly.

[0048] Among them, displacement monitoring equipment is installed on the outside of the raft to monitor whether the raft is displaced during the landslide process to ensure the safety of passage.

[0049] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An emergency method for maintaining the traffic flow of an interface landslide highway, characterized in that: A disposal unit is set at the landslide section of the slope, and multiple groups of disposal units are set. Multiple groups of disposal units are connected to form a temporary road at the landslide section. The disposal unit includes a raft, a consolidated pile foundation, a non-consolidated pile foundation and a tie beam; The method comprises the following steps: Step 1: Calculate the thrust of the landslide body at the pile foundation location based on the rock and soil conditions of the slope, and calculate the pile foundation shear reinforcement based on the thrust; Step 2: Close the highway traffic at the landslide section, mill and dig out the road surface and base layer at the landslide section, locate the positions of the consolidation pile foundation and the non-consolidation pile foundation, where the consolidation pile foundation and the non-consolidation pile foundation are distributed in a plum blossom shape, and the non-consolidation pile foundation is set at both ends of the raft in the length direction; Step 3: Drilling and pile foundation construction, and tie beam construction between unconsolidated pile foundations; Step 4: The steel bars in the consolidation pile foundation penetrate into the raft to be cast, the steel skeleton of the raft is tied, and the raft concrete is cast to realize the consolidation of the consolidation pile foundation and the raft, and the non-consolidation pile foundation and tie beam are supported at the bottom of the raft, completing the construction of the first section of the disposal unit; repeat the above steps to carry out the construction of other disposal units; Step 5: Connect the non-landslide section of the highway to the raft at the end of the landslide section through a slab to meet the traffic needs of the highway, lift the road closure, and carry out landslide control on the landslide section of the slope.

2. The method for emergency maintenance of an interface landslide highway according to claim 1, characterized in that: In step 1, the overall geological conditions of the slope are obtained through geological drilling to determine the type of landslide and the location of the sliding surface. At the same time, geotechnical tests are carried out based on soil samples to determine the cohesion and internal friction angle of the landslide body, and the thrust of the landslide body at the pile foundation position is calculated based on the rock and soil conditions.

3. The method for emergency maintenance of a highway with an interface landslide according to claim 1 is characterized by: In step 4, before the raft slab is constructed, a steel plate is laid on the bottom surface of the raft slab to be cast.

4. The method for emergency maintenance of an interface landslide highway according to claim 1, characterized in that: A displacement monitoring device is installed on the outer side of the raft.

5. The method for emergency maintenance of highway traffic in case of interface landslide according to claim 1, characterized in that: In step 5, after the landslide section is treated, the hollow part at the bottom of the raft is filled densely.

6. An interface type landslide highway emergency maintenance treatment structure, characterized by: It comprises a slope, a road arranged on the slope and a treatment unit arranged at the landslide section of the slope, wherein the treatment units are arranged in multiple groups, and the multiple groups of the treatment units are connected to form a temporary road at the landslide section, and the two ends of the temporary road are connected to the road at the non-landslide section through a slab; The disposal unit comprises a raft, a consolidation pile foundation, a non-consolidation pile foundation and a tie beam, wherein the non-consolidation pile foundation is arranged at both ends of the raft in the length direction, the tie beam is connected between the non-consolidation pile foundations along the width direction of the raft, and the non-consolidation pile foundation and the tie beam are supported on the bottom surface of the raft; The consolidation pile foundation is located between two groups of non-consolidation pile foundations, and its upper end is consolidated with the raft slab; the length ratio of the consolidation pile foundation and the non-consolidation pile foundation located at the upper and lower sections of the sliding interface is 1:0.8-1.

7. The interface type landslide highway emergency maintenance treatment structure according to claim 6 is characterized by: An asphalt surface layer is laid on the raft.

8. The interface type landslide highway emergency maintenance treatment structure according to claim 6 is characterized by: The bottom surface of the raft is provided with a steel plate.

9. The interface type landslide highway emergency maintenance treatment structure according to claim 6, characterized in that: The ends of two adjacent raft slabs are supported together on a set of unconsolidated pile foundations and tie beams.

10. The interface type landslide highway emergency maintenance treatment structure according to claim 6, characterized in that: The consolidation pile foundation and the non-consolidation pile foundation are distributed in a plum blossom shape at the bottom of the raft slab.

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