CN212270975U - Assembled composite soil nailing wall supporting structure - Google Patents
Assembled composite soil nailing wall supporting structure Download PDFInfo
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- CN212270975U CN212270975U CN202021341271.0U CN202021341271U CN212270975U CN 212270975 U CN212270975 U CN 212270975U CN 202021341271 U CN202021341271 U CN 202021341271U CN 212270975 U CN212270975 U CN 212270975U
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Abstract
The utility model discloses an assembled composite soil nailing wall supporting structure, which solves the problem that the existing soil nailing wall supporting structure has poor shockproof effect on the protection of the side slope with high stone content in the earthquake frequent occurrence area, the utility model comprises a protective surface layer and a composite steel pipe, the composite steel pipe is inserted into the protective side slope, the composite steel pipe is detachably connected with the protective surface layer through a connecting piece, the composite steel pipe comprises a hollow core pipe, a pipe sleeve and a side pipe, the core pipe comprises a conical bottom and a cylinder body, the pipe sleeve is sleeved on the outer layer of the core pipe, a clearance is arranged between the pipe sleeve and the core pipe to form an interlayer cavity, the side pipe is arranged in the interlayer cavity, and the inner cavity of the core pipe is communicated with the outside of the sleeve, elastic concrete is filled in the interlayer cavity, concrete is filled in the inner cavity of the core pipe and the side pipe, and concrete is filled in the composite steel pipe and the surrounding protective slope soil. The utility model has the advantages of stable structure, good shockproof effect and the like.
Description
Technical Field
The utility model relates to a side slope protection technical field, concretely relates to compound soil nailing wall supporting construction of assembled.
Background
Soil nailing Wall (Soil Nail Wall) is an in-situ Soil body reinforcement technology. The slope of the foundation pit is reinforced by soil nails made of materials such as reinforcing steel bars, a reinforcing mesh is laid on the surface of the slope, and a layer of concrete surface layer is sprayed on the surface of the slope to combine with the soil slope. The construction is a complex formed by firmly bonding a reinforced rod piece (namely a soil nail or an anchor rod) arranged in a slope body with the surrounding soil body, and a supporting structure similar to a gravity retaining wall formed by surface layers.
The soil nail is divided into the following types: the method comprises the steps of drilling and grouting, direct driving and grouting, wherein the drilling and grouting comprises the steps of firstly drilling a hole in a soil body by using mechanical equipment such as a drilling machine, then arranging a rod body (generally made of HRB335 ribbed steel bars) after the hole is formed, and then injecting cement slurry along the whole length. The drilling and grouting nail is almost suitable for various soil layers, has high pulling resistance, reliable quality and low manufacturing cost, and is the most common soil nail type. The direct driving is to directly drive steel pipes, angle steels and other section steels, reinforcing steel bars, mao bamboos, round timbers and the like into soil without grouting. The driven-in soil nail has small diameter, low bonding friction resistance with soil body, low bearing capacity and limited nail length, so the driven-in soil nail is densely arranged and can be driven by machines such as manpower or vibration impact drills, hydraulic hammers and the like. The direct driving-in soil nail has the advantages that the direct driving-in soil nail does not need to be drilled in advance, the disturbance to in-situ soil is small, the construction speed is high, the direct driving-in soil nail is difficult to drive into hard cohesive soil, the direct driving-in soil nail is not suitable for permanent supporting projects with service life longer than 2 years, the construction cost is slightly high when the rod body is made of metal materials, and the direct driving-in soil nail is rarely applied in. The grouting type is that grouting holes are arranged in the middle and the tail of a steel pipe to form a steel flower pipe, and cement paste is directly grouted into soil and then pressed to form soil nails. The steel perforated pipe grouting soil nail has the advantages of direct nail driving, high pulling resistance, wide application, higher manufacturing cost than drilling grouting soil nail, poor corrosion resistance and inapplicability to permanent engineering, and is particularly suitable for soft soil layers such as silt, mucky soil and the like with difficult hole forming, various filling soils and sandy soils.
However, in recent years, due to frequent earthquakes, the slope of the foundation pit in the highly earthquake-prone area is susceptible to landslide and serious personal and property loss, and particularly, the slope with high stone content has higher requirements for a supporting structure, so that a soil nailing wall supporting structure with better earthquake-proof effect needs to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the existing soil nailing wall supporting structure has poor shockproof effect on the protection of a side slope with high stone content in an earthquake frequent area, and can cause the problems of soil nailing loosening, falling, collapse and the like.
The utility model discloses a following technical scheme realizes:
compound soil nail wall supporting construction of assembled, including protection surface course and compound steel pipe, compound steel pipe inserts in the protection side slope, compound steel pipe pass through the connecting piece with the connection can be dismantled to the protection surface course, compound steel pipe includes hollow core pipe, pipe box and side pipe, the core pipe is including awl end and cylinder, the pipe box suit is in the skin of core pipe, the pipe box with clearance formation intermediate layer cavity has between the core pipe, the side pipe sets up in the intermediate layer cavity, the one end of side pipe with the cylinder connect and with the inner chamber intercommunication of core pipe, the other end of side pipe with pipe box connection just communicates with the outside, it has elastic concrete to fill in the intermediate layer cavity, it has concrete to fill in the inner chamber of core pipe and the side pipe, it has the concrete to fill in compound steel pipe and the protection side slope soil on every side.
The utility model discloses fully consider contain the high and side slope in earthquake area of stone volume, when receiving earthquake action, arouse the not hard up of ground to slide easily, at the vibrations in-process, the firm stone in the side slope rocks and makes the compound steel pipe in the protection side slope not hard up easily to lose fine pinning effect.
The utility model discloses consider the protection side slope that contains the stone gauge height, adopt earlier drilling, then squeeze into compound steel pipe, fill elastic concrete in the intermediate layer cavity of core pipe and sleeve pipe formation, thereby it is better to pack the concrete in the inner chamber of core pipe and sleeve pipe and protection side slope soil on every side and make compound steel pipe and protection side slope associativity on every side, pass through the connecting piece with the protection surface course with compound steel pipe and be connected, make the protection surface course, compound steel pipe plays protection reinforcing effect to the protection side slope together, and elastic concrete in the intermediate layer cavity is when the earthquake takes place to shake, can play certain cushioning effect to compound steel pipe, reduce the displacement that vibrations brought, weaken vibrations and rock or even become flexible to compound steel pipe, the adaptability of this supporting construction to the earthquake has been improved, protect the side slope better, reduce and slide.
Furthermore, the diameter of the sleeve is smaller than or equal to that of the conical bottom, so that the sleeve can enter the soil nail hole more smoothly in the process of driving the composite steel pipe.
The utility model discloses compound soil nail wall supporting construction of preferred assembled, be provided with the spring in the side pipe, the one end of spring is fixed to be set up the side pipe with the junction of core pipe, the other end of spring along the side pipe extends naturally, the natural length of spring is less than or equal to the length of side pipe.
The utility model discloses a set up the spring of natural extension in the side pipe, in the inner chamber injection concrete through the core pipe, the concrete can flow in to the side pipe, under the impetus of concrete, certain extension deformation can take place for the spring, and when the earthquake takes place, the deformation of spring can produce the energy-absorbing to horizontal vibrations, plays absorbing effect to play certain guard action to compound steel pipe.
The core pipe with the junction of side pipe is provided with the flange, the spring with flange fixed connection, the flange setting makes the spring can fix better, prevents to take place to drop at the concrete propulsion in-process.
The utility model discloses compound soil nail wall supporting construction of preferred assembled, the core pipe with connecting piece threaded connection, threaded connection are one kind can dismantle the connection for supporting construction is the assembled structure, easily installs and dismantles, and on the other hand, threaded connection is more firm, can make the wholeness of protection surface course and compound steel pipe good.
The utility model discloses compound soil nailing wall supporting construction of preferred assembled, the lateral wall at the bottom of the awl is provided with the through-hole, when the pressurization slip casting, through enabling the concrete through entering into the protection side slope soil body around the compound steel pipe to make the compound steel pipe more firm with being connected between the protection side slope.
The utility model discloses compound soil nail wall supporting construction of preferred assembled, the protection surface course is flexible inoxidizing coating, flexible inoxidizing coating is provided with the strengthening rib, the connecting piece with the connection can be dismantled to the strengthening rib.
The utility model discloses compound soil nail wall supporting construction of preferred assembled, the strengthening rib includes mutually perpendicular's first strengthening rib and second strengthening rib, first strengthening rib and second strengthening rib cross formation tie point, the connecting piece with the connection can be dismantled to the tie point.
The strengthening rib has improved the protecting effect of protection surface course on the one hand, and on the other hand also can carry out fixed connection better with compound steel pipe, keeps whole supporting construction's wholeness and steadiness.
The construction process of the assembled composite soil nailing wall supporting structure comprises the following steps:
step 1: drilling holes on the protective side slope to form soil nail holes, wherein the hole diameter is 1.05-1.1 times of the diameter of the composite steel pipe;
step 2: driving the composite steel pipe into the protective side slope along the soil nail hole;
and step 3: injecting elastic concrete into the interlayer cavity;
and 4, step 4: injecting concrete into the inner cavity of the core pipe, wherein the concrete flows into the adjacent slope along the side pipe;
and 5: and laying the protective surface layer on the protective side slope, and fixing the protective surface layer and the composite steel pipe through the connecting piece.
The utility model relates to a side slope structure with high stone content and high earthquake occurrence frequency, which has larger hardness and is not convenient for directly driving composite steel pipes, therefore, holes are drilled firstly, the aperture is slightly larger than the diameter of the composite steel pipes, the composite steel pipes can be conveniently inserted, after the composite steel pipes are inserted, the grouting is carried out twice, once, elastic concrete is injected into an interlayer cavity between a sleeve pipe and a core pipe, and twice, concrete is injected into an inner cavity of the core pipe under pressure, the concrete in the inner cavity flows into a side slope soil layer outside the sleeve pipe along a side pipe, for the elastic concrete formed by the primary grouting, the composite steel pipes can be buffered and damped when the side slope vibrates, and the secondary injection can lead the composite steel pipes to form better connection with the side slope, in the secondary grouting process, springs are arranged in the side pipe, in the process that the concrete flows from the inner cavity of the core pipe to the side pipe, the springs can be promoted to be, when an earthquake occurs and the inside of the side slope shakes, the deformation energy of the spring can absorb the energy generated by earthquake waves in the stratum to a certain extent, so that the displacement caused by the earthquake waves is reduced, and the composite steel pipe is effectively protected.
And in the step 4, when the protective surface layer is specifically paved, the connecting point is aligned with the composite steel pipe and is connected by the connecting piece.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model discloses consider the earthquake district slope that contains the stone gauge height, combine current slip casting that punches and squeeze into two kinds of soil nail wall construction methods of slip casting type, adopt earlier the aperture, squeeze into the mode of compound steel pipe and slip casting again, obtained wholeness good, shockproof effectual soil nail wall supporting construction.
2. The utility model discloses improve current steel floral tube, adopt the compound steel pipe of two-layer structure, pour into elastic concrete in the intermediate layer cavity, pour into concrete in core tube inner chamber and the protection slope soil layer on every side, obtained the compound steel pipe that has the buffering effect, and compound steel pipe pinning is firm in the protection slope.
3. The utility model discloses a side pipe flows into the passageway in the protection side slope soil layer as the concrete to set up the spring of the fixed natural extension of one end in the side pipe, when the pressurization slip casting, the concrete can drive the tensile deformation of spring, and when the earthquake, the spring of deformation can reduce the vibrations that the earthquake wave brought to a certain extent and slide, improves the steadiness that compound steel pipe and protection side slope soil layer combined.
4. The utility model discloses a compound steel pipe with the connection can be dismantled to protection surface course screw thread, easy dismounting, the wholeness is good.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a front view structure schematic diagram of the composite steel pipe of the present invention.
Fig. 3 is a schematic cross-sectional overhead structure view of the composite steel pipe before grouting of the present invention.
Fig. 4 is the cross section of the post-grouting composite steel pipe of the present invention is a schematic structural view in plan view.
Fig. 5 is a schematic view of the protective surface layer of the present invention.
Reference numbers and corresponding part names in the drawings:
1-protective surface layer, 100-first reinforcing rib, 101-second reinforcing rib, 2-composite steel pipe, 3-core pipe, 30-column body, 31-conical bottom, 310-through hole, 32-internal thread, 4-sleeve pipe, 5-side pipe, 6-interlayer cavity, 7-connecting piece, 70-external thread, 71-nut, 8-elastic concrete, 9-concrete, 10-spring, 11-flange and 12-protective side slope.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
As shown in fig. 1-5, an assembled composite soil nailing wall supporting structure includes a protective surface layer 1 and a composite steel pipe 2, the composite steel pipe 2 is inserted into a protective side slope 12, the composite steel pipe 2 is detachably connected with the protective surface layer 1 through a connecting member 7, the composite steel pipe 2 includes a hollow core pipe 3, a pipe sleeve and a side pipe 5, the core pipe 3 includes a conical bottom 31 and a cylinder 30, the pipe sleeve is sleeved on an outer layer of the core pipe 3, a diameter of the sleeve 4 is equal to a diameter of the conical bottom 31, a gap is formed between the pipe sleeve and the core pipe 3 to form an interlayer cavity 6, the side pipe 5 is disposed in the interlayer cavity 6, one end of the side pipe 5 is connected with the cylinder 30 and communicated with an inner cavity of the core pipe 3, the other end of the side pipe 5 is connected with the pipe sleeve and communicated with the outside, the interlayer cavity 6 is filled with elastic concrete 8, concrete 9 is filled in the inner cavity of the core pipe 3 and the side pipe 5, and concrete 9 is filled in the composite steel pipe 2 and the surrounding protective slope 12.
The elastic concrete 8 is polyurethane concrete.
The concrete 9 is high-strength concrete.
The side wall of the conical bottom 31 is provided with a through hole 310, so that when pressurized grouting is performed, the concrete 9 can enter the soil body of the protective side slope 12 around the composite steel pipe 2, and the connection between the composite steel pipe 2 and the protective side slope 12 is more stable.
The protective surface layer 1 comprises reinforcing ribs and a flexible surface, the reinforcing ribs comprise a first reinforcing rib 100 and a second reinforcing rib 101 which are perpendicular to each other, the first reinforcing rib 100 and the second reinforcing rib 101 are crossed to form a connecting point, and the connecting piece 7 is detachably connected with the connecting point.
The upper section of the inner cavity of the core tube 3 is provided with an internal thread 32, the connecting piece 7 is provided with an external thread 70, the core tube 3 is in threaded connection with the connecting piece 7, and the connecting piece 7 passes through the connecting point of the first reinforcing rib 100 and the second reinforcing rib 101 and is screwed up and fixed by the nut 71.
In the specific connection, the connector 7 sequentially passes through the second reinforcing rib 101, the first reinforcing rib 100 and the flexible face and then enters the core tube 3, and then is screwed and fixed by the nut 71.
Example 2
The present embodiment is different from embodiment 1 in that a spring 10 is disposed in the side tube 5, one end of the spring 10 is fixedly disposed at the connection position of the side tube 5 and the core tube 3, the other end of the spring 10 naturally extends along the side tube 5, and the natural length of the spring 10 is less than or equal to the length of the side tube 5.
The connection part of the core pipe 3 and the side pipe 5 is provided with a flange 11, the spring 10 is fixedly connected with the flange 11, and the flange 11 is arranged to enable the spring 10 to be better fixed and prevent falling off in the pushing process of the concrete 9.
The construction process of the assembled composite soil nailing wall supporting structure comprises the following steps:
step 1: drilling holes on the protective side slope 12 to form soil nail holes, wherein the hole diameter is 1.05-1.1 times of the diameter of the composite steel pipe 2;
step 2: the composite steel pipe 2 is driven into the protective side slope 12 along the soil nail hole;
and step 3: injecting elastic concrete 8 into the interlayer cavity 6;
and 4, step 4: injecting concrete 9 into the inner cavity of the core pipe 3, wherein the concrete 9 flows into the adjacent slope soil along the side pipe 5;
and 5: the protective surface layer 1 is laid on the protective side slope 12, and the protective surface layer 1 and the composite steel pipe 2 are fixed through the connecting piece 7.
And in the step 4, when the protective surface layer 1 is specifically paved, the connecting point is aligned with the composite steel pipe 2 and is connected by the connecting piece 7.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. An assembled composite soil nailing wall supporting structure is characterized by comprising a protective surface layer (1) and a composite steel pipe (2), wherein the composite steel pipe (2) is inserted into a protective side slope (12), the composite steel pipe (2) is detachably connected with the protective surface layer (1) through a connecting piece (7), the composite steel pipe (2) comprises a hollow core pipe (3), a pipe sleeve and a side pipe (5), the core pipe (3) comprises a conical bottom (31) and a cylinder body (30), the pipe sleeve is sleeved on the outer layer of the core pipe (3), a gap is formed between the pipe sleeve and the core pipe (3) to form an interlayer cavity (6), the side pipe (5) is arranged in the interlayer cavity (6), one end of the side pipe (5) is connected with the cylinder body (30) and communicated with the inner cavity of the core pipe (3), the other end of the side pipe (5) is connected with the pipe sleeve and communicated with the outside, elastic concrete (8) is filled in the interlayer cavity (6), concrete (9) is filled in the inner cavity of the core pipe (3) and the side pipe (5), and concrete (9) is filled in the composite steel pipe (2) and the surrounding protective slope (12) concrete.
2. The fabricated composite soil nailing wall supporting structure according to claim 1, wherein a spring (10) is arranged in the side pipe (5), one end of the spring (10) is fixedly arranged at the joint of the side pipe (5) and the core pipe (3), the other end of the spring (10) naturally extends along the side pipe (5), and the natural length of the spring (10) is less than or equal to the length of the side pipe (5).
3. The fabricated composite soil nailing wall supporting structure according to claim 1 or 2, wherein the core tube (3) is screw-coupled with the connection member (7).
4. The fabricated composite soil nailing wall supporting structure according to claim 1 or 2, wherein the side wall of the conical bottom (31) is provided with a through hole (310).
5. The fabricated composite soil nailing wall supporting structure according to claim 1 or 2, wherein the protective surface layer (1) is a flexible protective layer provided with reinforcing ribs, and the connecting pieces (7) are detachably connected with the reinforcing ribs.
6. The fabricated composite type soil nailing wall supporting structure according to claim 5, wherein the reinforcing bars comprise a first reinforcing bar (100) and a second reinforcing bar (101) which are perpendicular to each other, the first reinforcing bar (100) and the second reinforcing bar (101) cross to form a connection point, and the connecting member (7) is detachably connected with the connection point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021341271.0U CN212270975U (en) | 2020-07-09 | 2020-07-09 | Assembled composite soil nailing wall supporting structure |
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| CN202021341271.0U CN212270975U (en) | 2020-07-09 | 2020-07-09 | Assembled composite soil nailing wall supporting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676990A (en) * | 2020-07-09 | 2020-09-18 | 中信国安建工集团有限公司 | Assembled composite soil nailing wall supporting structure and construction process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676990A (en) * | 2020-07-09 | 2020-09-18 | 中信国安建工集团有限公司 | Assembled composite soil nailing wall supporting structure and construction process |
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