CN220414267U - New and old dam connection structure for rubbish dam development - Google Patents

Abstract

The utility model discloses a new and old dam connecting structure for a garbage dam, which comprises a reinforcing part and an heightening part, wherein the reinforcing part is connected with the side wall of an old dam body, and the heightening part is arranged on the top surfaces of the reinforcing part and the old dam body; the reinforcement part comprises a plurality of reinforcement layers which are stacked along the height direction of the old dam body; one side of the reinforcement layer, which is close to the old dam body, is connected with the old dam body through a traction piece; the reinforcing part further comprises a reinforcing component, wherein the reinforcing component comprises a cast-in-place pile and a waist beam; the filling pile is vertically driven into the ground; the waist beams are vertically arranged, and the waist beams are connected with the old dam body through anchoring pieces. The new and old dam connecting structure can not only improve the anti-slip force of the potential slip plane of the old dam body, but also enhance the connection between the new dam body and the old dam body and improve the joint working performance and the coordinated deformation capacity of the new and old dam bodies, thereby achieving the purpose of in-situ expansion.

Description

New and old dam connection structure for rubbish dam development

Technical Field

The utility model relates to the field of buildings, in particular to a new and old dam connecting structure for a garbage dam.

Background

With the rapid increase of the amount of domestic waste, the existing landfill is difficult to continue to fill the increasing amount of waste, and in view of the limited land used for the landfill and the limited storage capacity of the existing landfill, the extension treatment of the existing landfill is required to improve the storage capacity of the existing landfill.

In the process of heightening, reinforcing and capacity expanding a garbage field, a higher garbage dam needs to be newly built along the existing old garbage dam, the garbage dam is generally a homogeneous earth dam, the dam body can be regarded as a homogeneous slope, the connecting part of the new and old dam body is the weakest part of the slope according to computational analysis and engineering experience, and the weakest sliding surface of the slope is located at the weakest part. However, if the prior art is used as an earth dam body, and the old dam body is piled up to form an anti-slip ladder and then is piled up and reinforced, the dam body cannot maintain the coordinated deformation of the new dam body and the old dam body, so that cracks are easily generated between the new dam body and the old dam body, the stability of the whole dam body is further affected, and the phenomenon of landslide can easily occur in the future.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a new and old dam connecting structure for the rubbish dam extension, which can reduce the generation of cracks between a new dam body and an old dam body when reinforcing and extending the old dam body, strengthen the connection effect between the new and old dam bodies and strengthen the integrity of the new and old dam bodies, so that the new and old dam bodies can coordinate deformation and work together, and further improve the stability of the rubbish dam.

The technical scheme for solving the technical problems is as follows:

a new and old dam connecting structure for constructing a garbage dam is used for reinforcing and constructing an old dam body; the dam comprises a reinforcing part and an heightening part, wherein the reinforcing part is connected with the side wall of the old dam body, and the heightening part is arranged on the top surfaces of the reinforcing part and the old dam body; the reinforcement part comprises a plurality of reinforcement layers which are stacked along the height direction of the old dam body; one side of the reinforcement layer, which is close to the old dam body, is connected with the old dam body through a traction piece;

the reinforcing part further comprises a reinforcing component for reinforcing the connection between the new dam body and the old dam body, the reinforcing component comprises a cast-in-place pile and a waist beam arranged on the cast-in-place pile, wherein the cast-in-place pile and the waist beam are multiple groups, and the cast-in-place piles are arranged in parallel and vertically driven into the ground; the waist beams are vertically arranged, and each waist beam is connected with a plurality of groups of filling piles; the old dam body is connected with the waist beam through anchoring pieces.

Preferably, the traction piece comprises a steel floral tube and a steel tube; one end of the steel flowtube is inserted into the old dam body, and the other end of the steel flowtube extends out of the old dam body and is connected with the steel tube; the axial direction of the steel pipe is perpendicular to the axial direction of the steel flower pipe; the reinforced layer comprises reinforced geotextile and a filler layer which is arranged in the reinforced geotextile and wrapped by the reinforced geotextile, wherein the tail ends of the reinforced geotextile which are positioned on the bottom surface of the filler layer are all pressed by a plurality of bagged gravels, the edge of the lower reinforced geotextile is rolled up to the other side of the bagged gravels and is pressed by the filler layer of the layer, and the edge of the upper reinforced geotextile is rolled down and is pressed by the bagged gravels.

Preferably, the rest positions in the reinforced geotextile except the bagged broken stone are filled with soil-stone mixture to form the filling layer.

Preferably, grouting holes are formed in the circumferential direction of the steel flowtube, the grouting holes are arranged along the axial direction of the steel flowtube, and grouting channels communicated with the grouting holes are formed in the steel flowtube.

Preferably, the anchoring piece comprises an anchor rope, an anchor backing plate, an anchor and a PVC pipe, wherein the old dam body is provided with a mounting hole for mounting the PVC pipe, and the PVC pipe is mounted in the mounting hole and horizontally extends; one end of the anchor cable is fixed on the waist rail through the anchor device, and the other end of the anchor cable penetrates through the PVC pipe and then is connected with the old dam body; the anchor backing plate is installed between the anchor and the waist beam.

Preferably, a concrete cover plate is arranged above the cast-in-place pile, and the concrete cover plate is positioned on the top surface of the old dam body.

Preferably, the PVC pipe and the mounting hole are filled with cement mortar.

Preferably, the upper layer and the lower layer in the reinforced geotextile are fixed on the filling layer through the nails.

Preferably, an embedded structure is arranged in the reinforced geotextile positioned on the lower layer in the reinforced layer, the embedded structure is a gully arranged on the bottom surface of the filler layer, and the reinforced geotextile positioned at the gully is pressed at the gully through the soil-stone mixture.

Preferably, the steel flower pipe and the anchor cable are arranged adjacently and alternately.

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

1. according to the new and old dam connecting structure for the rubbish dam, one end of the anchoring piece is locked on the filling pile through the locking connection function of the pile anchor system, and the other end of the anchoring piece is anchored in the old dam body, so that on one hand, the anti-slip force of a potential slip surface of the old dam body can be directly improved, and on the other hand, the filling pile in the new dam body is pulled due to the tensioning function of the anchoring piece, so that the connection between the new dam body and the old dam body is enhanced, the joint working performance and the coordinated deformation capacity of the new dam body and the old dam body are further improved, and the purpose of in-situ expansion is achieved.

2. The new and old dam connecting structure constructed by the garbage dam is convenient to construct, and is beneficial to improving the connection stability between the Gao Xin dam body and the old dam body so as to enhance the working performance of the dam body.

Drawings

Figure 1 is a schematic diagram of a new and old dam connection structure constructed by the garbage dam of the present utility model,

fig. 2 is a schematic diagram of a steel flowtube-steel tube-geotextile system.

Fig. 3 is a schematic view of the installation of the reinforcement assembly.

Fig. 4 is a diagram showing a slope treatment.

Fig. 5 is a cross-sectional view of a steel flowtube.

Fig. 6 is a cross-sectional view of the cable bolt.

Detailed Description

The present utility model will be described in further detail with reference to examples and drawings, but embodiments of the present utility model are not limited thereto.

Referring to fig. 1-6, the new and old dam connection structure of the present utility model is used for reinforcing and building an old dam body 13, and comprises a reinforcing part and a heightening part 5, wherein the reinforcing part is connected with the side wall of the old dam body 13, and the heightening part 5 is arranged on the top surfaces of the reinforcing part and the old dam body 13; the reinforcement part comprises a plurality of reinforcement layers which are stacked along the height direction of the old dam body 13; one side of the reinforcement layer, which is close to the old dam body 13, is connected with the old dam body 13 through a traction piece; the heightening part 5 does not need to be in direct contact with the old dam body 13, so the method can be used for directly layering backfilling soil and stone mixture and tamping the mixture into a dam.

Referring to fig. 1-6, the traction member comprises a steel floral tube 4 and a steel tube 2; one end of the steel pipe 4 is inserted into the old dam body 13, and the other end extends out of the old dam body 13 and is connected with the steel pipe 2; the axial direction of the steel pipe 2 is perpendicular to the axial direction of the steel flower pipe 4; the reinforced layer comprises reinforced geotextile 3 and bagged broken stone 7.

In this embodiment, the reinforced geotextile 3 is an engineering material for reinforcing soil with long-term design life, and has the characteristics of corrosion resistance, chemical resistance and good water permeability, and the reinforced geotextile 3 can not only ensure the stability of the soil, but also play a role in reverse filtration and isolation (the landfill leachate can erode the dam); under the tensile force of the steel pipe 2, the reinforced geotextile 3 above and below each layer of the filling layer 11 can tightly connect the filling layer 11 with the steel flowtube 4 to form a steel flowtube 4-steel pipe 2-geotextile connecting system, so that the connecting effect between the new and old dam bodies 13 is enhanced; in addition, the steel pipe 2 is welded on the steel flower pipe 4 and is used for pulling the reinforced geotextile 3 on the upper layer and the lower layer, and the pipe length direction of the steel pipe 2 is consistent with the trend of the dam body;

referring to fig. 1-6, the reinforcement part further comprises a reinforcement component for reinforcing the connection strength of the new dam body 12 and the old dam body 13, the reinforcement component comprises a cast-in-place pile 1 and a waist beam 8 arranged on the cast-in-place pile 1, wherein the cast-in-place pile 1 and the waist beam 8 are multiple groups, and the cast-in-place piles 1 are arranged in parallel and are driven into the ground vertically; the waist beams 8 are vertically arranged, and each waist beam 8 is connected with a plurality of groups of cast-in-place piles 1; the old dam body 13 is connected with the waist beam 8 through anchoring pieces;

the anchoring piece comprises an anchor rope 17, an anchor backing plate 16, an anchor 15 and a PVC pipe 18, wherein the old dam body 13 is provided with a mounting hole for mounting the PVC pipe 18, and the PVC pipe 18 is mounted in the mounting hole and horizontally extends; the PVC pipe 18 and the mounting hole are filled with cement mortar 19; one end of the anchor rope 17 is fixed on the waist beam 8 through the anchor device 15, and the other end of the anchor rope passes through the PVC pipe 18 and is connected with the old dam body 13; the anchor pad 16 is disposed between the anchor 15 and the waist rail 8, and in the whole tensioning process, the anchor pad 16 mainly plays a role in transmitting and dispersing the pressure of the tensioning device, that is, the compressive stress transmitted from the anchor 15 needs to be borne and transmitted to the waist (crown) beam, so that the compressive stress is distributed by each cast-in-place pile 1.

In the embodiment, the specification of the cast-in-place pile 1 is phi 1000@1500, C30 concrete is adopted, and the cast-in-place pile is constructed to the top of an old dam by setting up a template; in addition, each cast-in-place pile 1 is connected through the waist beam 8, so that the working performance of each cast-in-place pile 1 and the locking connection effect on the anchor cable 17 are enhanced, and the connection effect between the new dam body 13 and the old dam body 13 is further enhanced; the wale 8 is a concrete wale 8 made of C30 concrete, and is used for locking one end of an anchor rope 17 on the cast-in-place piles 1 and connecting the cast-in-place piles 1 into a whole, so that the cast-in-place piles 1 can share the tensile force of the anchor rope 17 together to enhance the connection between the old dam body 13 and the new dam body 12; the anchor cable 17 is a steel strand anchor cable 17, the anchor cable 17 is fixed on the waist beam 8 positioned on the cast-in-place pile 1 through the outer end, and the other end is anchored in the old dam body 13, so that on one hand, the anti-slip resistance on the potential sliding surface of the old dam body 13 can be directly increased, and on the other hand, the connection effect between the new dam body 12 and the old dam body 13 can be enhanced.

In addition, the anchor 15 employs an OVM15 anchor 15, in post-tensioned structures or members, the anchor 15 being an anchoring tool for maintaining and transmitting the tension of the prestressed steel strands to the interior of the concrete.

In addition, the PVC pipe 18 is sleeved on the free section of the anchor rope 17 and is used for separating the cement mortar 19 from the free section of the anchor rope 17, so that the free section of the anchor rope 17 is not solidified by the cement mortar 19 and cannot exert tensioning work performance; the PVC pipe 18 is coated with a corrosion-resistant lubricant.

Referring to fig. 1-6, the diameter of the steel flower pipe 4 is 48mm, grouting holes 9 are formed in the circumferential direction of the steel flower pipe 4, the grouting holes 9 are arranged along the axial direction of the steel flower pipe 4, and grouting channels communicated with the grouting holes 9 are formed in the steel flower pipe 4; in the early reinforcement process of the old dam body 13, the cementing liquid and the bacterial liquid can be mixed by the MICP technology and then injected into the old dam body 13 through the grouting holes 9, and the generated calcium carbonate is used for filling the pores and cracks in the old dam body 13 so as to meet the seepage-proofing requirement of the old dam body 13; and (3) grouting the steel flowtube 4 during filling, injecting cement mortar 19 into soil around the pipe body of the steel flowtube 4 through grouting holes 9, solidifying the soil and enabling the steel flowtube 4 to form anchoring parts, so that the grouting steel flowtube 4 is remained in the old dam 13 and firmly anchored by the old dam 13 to provide enough anchoring and anti-slip effects, the stability of the old dam 13 is improved, and the connection effect of the steel flowtube 4-steel pipe 2-geotextile system on the new and old dam 13 is enhanced, namely, the steel flowtube 4 has the functions of both soil nails and grouting pipes.

Referring to fig. 1 to 4, the upper filling layer 11 and the concrete cover plate 6 jointly press the cast-in-place pile 1 so as not to be overwhelmed by the filling layer 11 or pulled by the anchor cables 17; the concrete cover plate 6 is used as a cushion layer of the heightened part of the new dam body 12 upwards and bears the pressure of the overlying soil body together with the old dam body 13.

Referring to fig. 1-6, the rest positions except for the bagged gravels 7 in the reinforced geotextile 3 are filled with soil-stone mixture to form a filled layer 11; the upper layer and the lower layer in the reinforced geotextile 3 are fixed on the filler layer 11 through the studs 10.

Referring to fig. 1 to 6, the lower layer of reinforced geotextile 3 is provided with an embedded structure, the embedded structure is a gully 14 arranged on the bottom surface of the filler layer 11, and the reinforced geotextile 3 positioned at the gully 14 is pressed at the gully 14 by the soil-stone mixture.

The specific embodiment is as follows:

referring to fig. 1 to 6, the construction method of the new and old dam connection structure constructed by the garbage dam of the utility model comprises the following steps:

s1, before a new dam 12 is constructed, the old dam 13 needs to be reinforced before the constructed dam is filled; when the old dam body 13 is reinforced, the slope surface of the old dam body 13 contacted with the new dam body 12 needs to be drilled and positioned firstly, and after the installation holes are drilled, the steel flowtube 4 and the upper hole site and the lower hole site of the anchor rope 17 are installed into the holes alternately;

s2, welding a steel pipe 2 at the end part of the steel flowtube 4 extending out of the old dam body 13 for pulling the reinforced geotextile 3; the grouting holes 9 are formed in the pipe wall of the steel flowtube 4, and when the steel flowtube 4 is anchored into the old dam body 13, cement mortar 19 is injected into the steel flowtube 4, so that the steel flowtube 4 can be fixed on the old dam body 13, and meanwhile, grouting into the old dam body 13 can be achieved;

s3, as the old dam 13 positioned in the garbage yard has seepage prevention requirements (percolate seeping out from the garbage yard can erode the dam), the MICP technology (namely the microorganism-induced calcium carbonate precipitation technology) can be utilized for reinforcement treatment, namely before filling the soil and stone mixture and drilling holes on the dam feet, MICP cementing liquid and bacterial liquid are mixed and then injected into the old dam 13 through the grouting holes 9 of the steel flowtube 4, and as bacteria are very small, the bacteria can infiltrate into deeper positions through pores and cracks in the old dam 13, calcium carbonate deposition is induced in the pores and cracks by utilizing the MICP technology, the pores and the cracks are filled, the compactness of the old dam 13 is improved, and the seepage prevention performance of the old dam is further improved;

s4, positioning dam foots of the old dam body 13, aligning the positioned cross line intersection points by utilizing a drill bit of a rotary drilling rig, drilling pile injection holes after meeting the deviation requirement, cleaning the pile injection holes, and erecting a template on the in-situ ground of the pile injection holes, wherein the template extends upwards until the template is flush with the dam tops of the old dam body 13; hoisting the manufactured reinforcement cage to a position right above a template and aligning with a pile injection hole, then putting down and installing the reinforcement cage, and after installing, pouring C30 concrete into the template to form a filling pile 1 (phi 1000) until the filling pile 1 is flush with the dam top of the old dam body 13;

s5, when the cast-in-place pile 1 is constructed, the dam top of the old dam body 13 starts to construct a C20 concrete cover plate 6, the concrete cover plate 6 extends from the dam top of the old dam body 13 to the concrete column (namely the cast-in-place pile 1) until the bottom surface of the concrete cover plate 6 is flush with the column top of the concrete column (namely the cast-in-place pile 1), and then the concrete cover plate 6 is connected with the column top of the concrete column (namely the cast-in-place pile 1);

s6, arranging a concrete waist beam 8 on a pile section which is positioned at the same horizontal plane with the anchor rope 17 in the cast-in-place pile 1 and used for stretching and anchoring the anchor rope 17, wherein the anchor rope 17 is divided into an anchoring section and a free section, the free section of the anchor rope 17 is required to be sleeved with a PVC pipe 18, and the PVC pipe 18 is coated with an anti-corrosion lubricant to improve the working performance of the free section of the anchor rope 17; during pressure grouting, cement mortar 19 is injected into the space between the PVC pipe 18 and the wall of the mounting hole, and under the action of pressure, the cement mortar 19 flows to a deeper position, namely the anchoring section of the anchor cable 17, so that the cement mortar 19 flowing into the anchoring section of the anchor cable 17 can fix the anchor cable 17 and be connected with soil around the mounting hole into a whole to play a role of anchoring; grouting is continued after grouting of the anchoring section of the anchor cable 17 is completed so as to fill the space between the PVC pipe 18 and the wall of the mounting hole; after the strength of the cement mortar 19 is qualified, the anchoring anchor rope 17 is required to be stretched on the waist beam 8 to provide anchoring and anti-slip effects for potential slip surfaces of the old dam body 13, and meanwhile, the connection effect between the new dam body 12 and the old dam body 13 is also enhanced;

s7, filling and tamping the new dam body 12 into a dam by using soil and stone mixtures in a layered mode, covering the bottom surface of the layer of filling layer 11 by using the reinforced geotechnical cloth 3 before filling each layer, and covering the top surface of the layer of filling layer 11 by using the reinforced geotechnical cloth 3 again after filling and tamping of the layer of filling layer 11 are completed; the upper and lower layers of reinforced geotextile 3 are pulled by the steel pipes 2 (welded with the steel pattern pipes 4) arranged on the slope of the old dam body 13, so that the steel pipes 2 pull the reinforced geotextile 3 and the reinforced geotextile 3 can not be pulled to be misplaced or separated from the filling layers 11 by the soil particles of each layer of filling layers 11 in a displacement manner, thereby forming a steel pattern pipe 4-steel pipe 2-geotextile system;

s8, the upper and lower reinforced geotextiles 3 of each layer of the filling layer 11 are required to be fixed on the ground or the filling layer 11 by using the fixed nails 10; the lower layer reinforced geotextile 3 is required to be provided with an embedded structure, namely, a small channel gully 14 is dug on the bottom surface of the filling layer 11, the lower layer reinforced geotextile 3 is arranged in the gully 14 and filled with soil and stone mixture to play the roles of limiting, reinforcing and fixing the reinforced geotextile 3, so that the integrity of a steel pipe 4-steel pipe 2-geotextile system and each layer of filling layer 11 is enhanced, and the connection strength between the new dam body 12 and the old dam body 13 is enhanced;

s9, as the steel flower pipe 4 and the anchor cable 17 are alternately arranged adjacently up and down, when the filled filling layer 11 is provided with an installation hole corresponding to the filling layer 11 (namely when the anchor cable 17 or the steel flower pipe 4 is required to be installed), grouting is performed in time, and the anchor cable 17 is locked to be an anchor or grouting is performed by using the steel flower pipe 4; the cement mortar 19 can effectively fill the steel flowtube 4, and can be injected into surrounding soil through grouting holes 9 of the steel flowtube 4 to realize the purpose of solidifying the soil, and the steel flowtube 4 is firmly anchored in the old dam 13 after the cement mortar 19 is solidified to form anchoring parts, so that the anchoring capacity of the steel flowtube 4 is improved, the steel tube 2 can further tighten the reinforced geotechnical cloth 3, the connection effect between the new dam 12 and the old dam 13 is enhanced, and the old dam 13 is reinforced;

s10, the tail ends of the reinforced geotextile 3 on the bottom surface of each layer of filling layer 11 are pressed by a plurality of bagged gravels 7, the edge of the lower layer of reinforced geotextile 3 is rolled up until the other side of the bagged gravels 7 is pressed by the filling layer 11, and the edge of the upper layer of reinforced geotextile 3 is rolled down and pressed by the bagged gravels 7, so that the reinforced geotextile 3 is prevented from retracting or misplacing, the integrity of a steel pipe 4-steel pipe 2-geotextile system and each layer of filling layer 11 is further enhanced, and the connection effect between a new dam body 13 and an old dam body 13 is enhanced;

s11, as the new dam body 12 has slope setting requirements, the filling amount of each filling layer 11 is inconsistent; because the reinforced geotextile 3 wraps each layer of the filling layer 11, a part lacking the filling layer 11 appears between the upper layer of the filling layer 11 and the lower layer of the filling layer 11 due to slope setting, and the part needs to be continuously filled and tamped by the soil-stone mixture (see fig. 4 for details);

s12, the part above the concrete cover plate 6 belongs to the heightening part 5 of the new dam body 12, and the heightening part 5 does not need to be in direct contact with the old dam body 13, so that the dam can be obtained by directly compacting the backfill soil and stone mixture in layers.

Finally, the construction method of the new and old dam connection structure constructed by the garbage dam has the following advantages:

(1) The method is convenient to construct, is beneficial to the connection of the new dam body 12 and the old dam body 13, and enhances the working performance of the dam body;

(2) Grouting the mounting holes by pressure grouting equipment to form anchoring parts, locking anchor cables 17 by waist beams 8 on the cast-in-place pile 1 through anchor devices 15, and connecting the anchor cables 17 with the cast-in-place pile 1 to form a pile anchor system;

(3) On the basis of a steel flower pipe-steel pipe-reinforced geotextile system, a pile anchor system is added, anchor cables 17 in the pile anchor system and the steel flower pipe-steel pipe-reinforced geotextile system are alternately arranged up and down, the old dam body 13 is reinforced, meanwhile, the connection strength between the new dam body and the old dam body can be improved, and in addition, the steel flower pipe 4 also has the functions of soil nails and grouting pipes;

(4) The anti-slip resistance of the potential sliding surface of the old dam body 13 can be improved by utilizing the function of the steel flowtube 2 and the soil nails, and the old dam body 13 is anchored; by utilizing the functions of the steel flowtube 2 and the grouting tube and through the MICP technology and the pressure grouting cement mortar 19, the permeability resistance of the old dam body 13 can be effectively improved, and the old dam body 13 is reinforced to tightly anchor the steel flowtube 2 in the old dam body 13, so that the service life of the old dam body 13 is prolonged;

(5) The anchor piece can lock one end of the anchor rope 17 on the filling pile 1 through the locking connection function of the pile anchor system, and the other end of the anchor rope is anchored in the old dam body 13, so that on one hand, the anti-slip force of the potential slip surface of the old dam body 13 is directly improved by the anchor section, on the other hand, the filling pile 1 in the new dam body 12 is pulled by the tensioning function of the anchor rope 17, the connection between the new dam body 12 and the old dam body 13 is enhanced, the joint working performance and the coordinated deformation capacity of the two are improved, and the purpose of in-situ expansion is achieved;

(6) The tail end of the reinforced geotextile 3 is tightly pressed by using the bagged broken stone 7, so that the reinforced geotextile 3 can be ensured not to be misplaced;

(7) The concrete cover plate 6 can enhance the capability of the bored concrete pile 1 to bear the tensile force of the anchor cable 17 and the compressive force of the earth-rock mixture filling layer 11 so that the bored concrete pile 1 does not collapse or incline. Meanwhile, the combination of the concrete cover plate 6 and the cast-in-place pile 1 at the top of the old dam body 13 can be used as a foundation of the heightened part of the new dam body 12, so that the stability of the heightened part is enhanced.

The foregoing is illustrative of the present utility model and is not to be construed as limiting thereof, but rather as various changes, modifications, substitutions, combinations, and simplifications which may be made therein without departing from the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. A new and old dam connecting structure for constructing a garbage dam is used for reinforcing and constructing an old dam body; the dam comprises a reinforcing part and an heightening part, wherein the reinforcing part is connected with the side wall of the old dam body, and the heightening part is arranged on the top surfaces of the reinforcing part and the old dam body; the reinforcement part comprises a plurality of reinforcement layers which are stacked along the height direction of the old dam body; one side of the reinforcement layer, which is close to the old dam body, is connected with the old dam body through a traction piece; the method is characterized in that:

the reinforcing part further comprises a reinforcing component for reinforcing the connection between the new dam body and the old dam body, the reinforcing component comprises a cast-in-place pile and a waist beam arranged on the cast-in-place pile, wherein the cast-in-place pile and the waist beam are multiple groups, and the cast-in-place piles are arranged in parallel and vertically driven into the ground; the waist beams are vertically arranged, and each waist beam is connected with a plurality of groups of filling piles; the old dam body is connected with the waist beam through anchoring pieces.

2. The new and old dam connection structure for a garbage dam according to claim 1, wherein the traction member comprises a steel pipe and a steel pipe; one end of the steel flowtube is inserted into the old dam body, and the other end of the steel flowtube extends out of the old dam body and is connected with the steel tube; the axial direction of the steel pipe is perpendicular to the axial direction of the steel flower pipe; the reinforced layer comprises reinforced geotextile and a filler layer which is arranged in the reinforced geotextile and wrapped by the reinforced geotextile, wherein the tail ends of the reinforced geotextile which are positioned on the bottom surface of the filler layer are all pressed by a plurality of bagged gravels, the edge of the lower reinforced geotextile is rolled up to the other side of the bagged gravels and is pressed by the filler layer of the layer, and the edge of the upper reinforced geotextile is rolled down and is pressed by the bagged gravels.

3. The connection structure of new and old dams constructed by using the garbage dam according to claim 2, wherein the rest positions except for the bagged gravels in the reinforced geotextile are filled with soil-stone mixture to form the filling layer.

4. The connection structure of new and old dams constructed by using a garbage dam according to claim 2, wherein grouting holes are formed in the circumferential direction of the steel flowtube, the grouting holes are arranged along the axial direction of the steel flowtube, and grouting channels communicated with the grouting holes are formed in the steel flowtube.

5. The new and old dam connection structure for rubbish dam development according to claim 4, wherein the anchoring piece comprises an anchor rope, an anchor pad, an anchor device and a PVC pipe, wherein the old dam body is provided with a mounting hole for mounting the PVC pipe, and the PVC pipe is mounted in the mounting hole and extends horizontally; one end of the anchor cable is fixed on the waist rail through the anchor device, and the other end of the anchor cable penetrates through the PVC pipe and then is connected with the old dam body; the anchor backing plate is installed between the anchor and the waist beam.

6. The old and new dam connection structure for a waste dam according to claim 5, wherein a concrete cover plate is arranged above the cast-in-place pile, and the concrete cover plate is located on the top surface of the old dam body.

7. The old and new dam connection structure for a garbage dam according to claim 6, wherein the PVC pipe is filled with cement mortar between the PVC pipe and the mounting hole.

8. A new and old dam connection structure for a rubbish dam as claimed in claim 3, wherein the upper and lower layers of the reinforced geotechnical cloth are fixed on the filling layer by nails.

9. The connection structure of new and old dams constructed by the garbage dam according to claim 7, wherein an embedded structure is arranged in the reinforced geotextile positioned on the lower layer in the reinforced layer, the embedded structure is a gully arranged on the bottom surface of the filling layer, and the reinforced geotextile positioned on the gully is pressed on the gully through a soil-stone mixture.

10. The old and new dam connection structure for a garbage dam according to claim 5, wherein the steel pipe and the anchor cable are alternately arranged up and down.