CN117779788A - Method for constructing spray anchors among piles under sandy pebble geological condition - Google Patents
Method for constructing spray anchors among piles under sandy pebble geological condition Download PDFInfo
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- CN117779788A CN117779788A CN202311809069.4A CN202311809069A CN117779788A CN 117779788 A CN117779788 A CN 117779788A CN 202311809069 A CN202311809069 A CN 202311809069A CN 117779788 A CN117779788 A CN 117779788A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000007921 spray Substances 0.000 title claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 58
- 239000004567 concrete Substances 0.000 claims abstract description 35
- 238000005507 spraying Methods 0.000 claims abstract description 18
- 239000011378 shotcrete Substances 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 22
- 238000010276 construction Methods 0.000 claims description 13
- 239000004570 mortar (masonry) Substances 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 claims description 2
- 238000009435 building construction Methods 0.000 abstract description 4
- 230000008093 supporting effect Effects 0.000 description 16
- 230000000903 blocking effect Effects 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 239000002689 soil Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the field of building construction, and particularly discloses a method for constructing a spray anchor between piles under a sandy pebble geological condition, which comprises the following steps: cleaning the working surfaces among piles, so that the working surfaces among piles are free of sundries; paving a dense mesh type safety net on the working surface between piles, attaching the dense mesh type safety net to the working surface between piles, and fixing the dense mesh type safety net on the working surface between piles through a fixing structure; welding reinforcing ribs on the embedded ribs on the side surfaces of the adjacent pile bodies, connecting the embedded ribs on the side surfaces of the adjacent pile bodies by the reinforcing ribs, taking the reinforcing ribs as positioning, and erecting reinforcing mesh sheets; and spraying concrete towards the reinforced mesh, wherein the sprayed concrete covers the dense mesh type safety net and the reinforced mesh on the working surface between piles to form a retaining wall. By adopting the scheme of the invention, the problem that the sandy pebble stratum is easy to collapse, so that the temporary support of the working face between piles is required before the reinforced net is erected to spray concrete is solved.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a method for spraying anchors among piles under a sandy pebble geological condition.
Background
Along with the continuous promotion of urban and economic development, the construction requirement of high-rise buildings is increased, and the support of underground foundation pits, namely the foundation of the building, is one of the difficulties of building construction all the time, especially under the geological condition of sandy cobbles, the soil layer on the wall surface of the foundation pit can collapse in the construction process, so that safety accidents are caused.
The existing foundation pit supporting mode generally adopts supporting piles to support, namely, the supporting piles are driven into the circumference of the side wall of the foundation pit, the supporting piles can vertically and transversely support the wall surface of the foundation pit, further displacement, sinking and the like of the foundation pit are avoided, the more the supporting piles are, the shorter the distance between adjacent supporting piles is, the better the supporting effect is, but the influence of the soil condition in the foundation pit is achieved, a certain distance is often reserved between the adjacent supporting piles, therefore, concrete needs to be sprayed on the wall surface (namely, the working surface between the piles) of the foundation pit between the adjacent supporting piles to form a supporting wall, and the conventional construction method is generally as follows: and erecting a reinforcing mesh on a working surface between the adjacent pile bodies, and then spraying concrete on the reinforcing mesh to ensure that the reinforcing mesh has a certain supporting effect on the sprayed concrete.
The sand and pebble stratum is easy to collapse under the geological influence, so that temporary support is needed to be carried out on the working surface between piles before the reinforced mesh is erected to spray concrete, accidents in the construction process are avoided, in the prior art, a layer of concrete is usually sprayed on the working surface between piles in a dry mode to serve as a temporary protection layer, the construction cost is increased, and when a fine sand layer is encountered, the fine sand layer is subjected to impulsive force during the spraying of dry sprayed concrete, and the whole piece of sand layer is likely to collapse.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a construction method for spraying anchors among piles under the geological condition of sandy cobbles, so as to solve the problem that the sandy cobbles are easy to collapse, and therefore, the working surfaces among piles need to be temporarily supported before a reinforcing mesh is erected to spray concrete.
According to the embodiment of the invention, the following technical scheme is adopted:
the construction method of the inter-pile anchor spraying under the sandy pebble geological condition comprises the following steps:
s1, cleaning a working surface between piles, so that the working surface between piles is free of sundries;
s2, paving a dense mesh type safety net on the working surface between piles, attaching the dense mesh type safety net to the working surface between piles, and fixing the dense mesh type safety net on the working surface between piles through a fixing structure;
s3, welding reinforcing ribs on the embedded ribs on the side surfaces of the adjacent pile bodies, connecting the embedded ribs on the side surfaces of the adjacent pile bodies by the reinforcing ribs, taking the reinforcing ribs as positioning, and erecting a reinforcing mesh;
and S4, spraying concrete towards the reinforcing mesh, wherein the sprayed concrete covers the dense mesh type safety net and the reinforcing mesh on the working surface between piles to form a retaining wall.
Compared with the prior art, the invention has the following beneficial effects:
in this scheme, through fixed close mesh formula safety net on the face between the stake for close mesh formula safety net can play the effect of temporary support, and specifically, close mesh formula safety net can prevent that sand bed, rubble, tiny particle debris etc. from dropping from the face between the stake, protects job site and workman's safety, also can play the basic supporting role to the face soil body between the stake to a certain extent, slows down the motion of soil body, and then prevents that the soil body from taking place temporary collapse, provides relatively safe environment for follow-up construction, and if there is water in the foundation ditch wall, also can discharge through close mesh formula safety net, avoid the collapse that groundwater piles up the result in. In addition, during the subsequent concrete spraying, the dense mesh type safety net can play a role in supporting the mould to a certain extent, so that the shape of the concrete is maintained, and the concrete spraying effect is improved.
In addition, the dense mesh type safety net is a common material in building construction, has low cost and obvious economic benefit, is convenient to operate, can realize effective support of sandy pebble geology, and has great application value.
Further, the mesh density of the dense mesh type safety net is not lower than 2000 mesh/100 cm 2 。
Further, the reinforcing mesh is formed by binding reinforcing bars with the diameter of 8-10mm, and the distance between adjacent reinforcing bars is not more than 20cm.
Further, the fixing structure comprises an anchor rod, one end of the anchor rod is detachably connected with a limiting block, the other end of the anchor rod is provided with a conical insertion part, and the outer wall of the anchor rod is fixedly provided with a spiral blade; anchoring the anchor rods on the working surface between piles, forming perforations for the end parts of the anchor rods to pass through on the dense mesh type safety net, and then connecting limiting blocks to the anchor rods to fix the dense mesh type safety net.
Further, a flow hole along the axial direction of the anchor rod is formed in the anchor rod, and a plurality of discharge holes communicated with the flow hole are formed in the side wall of the anchor rod; and after the dense mesh safety net is installed, pouring concrete mortar into the flow holes.
Further, a blocking piece is inserted into the discharge hole, the end part of the blocking piece extends into the flow hole, a wedge surface is arranged on one side of the blocking piece, which is positioned in the flow hole, and the wedge surface faces one side of the limiting block.
Further, the annular groove for clamping the reinforcing steel bars of the reinforcing steel bar net is formed in the limiting block, when the reinforcing steel bar net is erected, initial reinforcing steel bars are erected at the limiting block through positioning of the limiting block, then other reinforcing steel bars are bound to form the reinforcing steel bar net, and after the erection is completed, the initial reinforcing steel bars and the limiting block are welded.
Further, the ends of the reinforcement meshes between the adjacent pile bodies are fixed through arc-shaped reinforcement bars, the arc-shaped reinforcement bars are wound on the outer sides of the pile bodies, in the step S4, concrete spraying is performed twice, the reinforcement meshes are covered by the concrete layer sprayed for the first time, the pile bodies are covered by the concrete layer sprayed for the second time, and the arc-shaped reinforcement bars are covered.
Further, a plurality of abutting blocks are fixed on the reinforcing mesh, and the abutting blocks are located between the reinforcing mesh and the dense mesh type safety net and used for abutting the dense mesh type safety net on the working surface between piles.
Further, in step S1, sand bags are filled in the depressions on the inter-pile working face, so that the inter-pile working face is flat.
Drawings
Fig. 1 is a top view of an overall structure of an embodiment of the present invention.
Fig. 2 is a top view of an embodiment of the present invention.
Fig. 3 is a top view of the fixing structure of fig. 1.
Fig. 4 is a front view of an embodiment of the present invention.
In the figure: 1. a pile body; 2. a bolt; 3. an insertion section; 4. a blade; 5. arc-shaped steel bars; 6. reinforcing steel bar meshes; 7. a limiting block; 8. a dense mesh safety net; 9. blocking; 10. wedge surface; 11. an abutment block; 12. a flow hole; 13. an annular groove; 14. and (5) planting tendons.
Detailed Description
The invention is described in further detail below with reference to the drawings in the specification and the detailed description is given.
As shown in fig. 1 and 2, the method for constructing the inter-pile anchor under the sandy pebble geological condition comprises the following steps:
s1, cleaning the inter-pile working face, so that the inter-pile working face is free of sundries, if the inter-pile working face is uneven, namely, the inter-pile working face is provided with a concave part, sand bags are filled in the concave part on the inter-pile working face, and further the inter-pile working face is even.
S2, paving a dense mesh type safety net 8 on the working surface between piles, wherein the mesh density of the dense mesh type safety net 8 is not lower than 2000 meshes per 100cm 2 So as to ensure that the dense mesh safety net 8 can prevent sand layers, broken stones, small particle sundries and the like from falling from the working surfaces between piles, and the working surfaces between piles can be normally drained. The dense mesh type safety net 8 is attached to the working surface between piles, and the dense mesh type safety net 8 is attached to the working surface between piles well due to the fact that the dense mesh type safety net 8 has certain flexibility, and then the dense mesh type safety net 8 is fixed to the working surface between piles through a fixing structure.
Specifically, combine the fig. 3 to show, fixed knot constructs including stock 2, stock 2 one end can be dismantled and be connected with stopper 7, the stock 2 other end is equipped with and is conical insert 3, stock 2 outer wall is fixed with and is helical blade 4, during the construction, anchor stock 2 on the interpile working face earlier for insert 3 insert in the interpile working face, through the design of blade 4, can be with stock 2 with the mode of similar screwing in the screw with stock 2 bore in the interpile working face, and the design is conical insert 3 and is more convenient for stock 2 bore in, make stock 2 tip expose with the interpile working face. Then, the dense mesh type safety net 8 is provided with perforations for the end parts of the anchor rods 2 to pass through, the dense mesh type safety net 8 is paved on the working surface between piles, the exposed end parts of the anchor rods 2 pass through the perforations, and then the limiting block 7 is connected to the anchor rods 2 through threads to fix the dense mesh type safety net 8.
The anchor rod 2 is internally provided with the flow holes 12 along the axial direction, the side wall of the anchor rod 2 is provided with a plurality of discharge holes communicated with the flow holes 12, after the installation of the dense mesh safety net 8 is completed, concrete mortar is poured into the flow holes 12, in the practical operation process, concrete mortar can be poured between the non-installed limiting blocks 7, the feeding holes can be formed in the limiting blocks 7 so as to be convenient for pouring the concrete mortar, the concrete mortar flows along the flow holes 12 and fills the flow holes 12, meanwhile, the concrete mortar can flow out of the anchor rod 2 through the discharge holes, gaps between the outer wall of the anchor rod 2 and a foundation pit soil layer are filled, in particular gaps between the filling blades 4 are filled, and after the concrete mortar is solidified, the concrete mortar is matched with the blades 4, so that the anchor of the anchor rod 2 in the foundation pit wall surface is firmer. In order to avoid that soil body is blocked in the inflow hole 12 by the discharge hole when the anchor rod 2 is drilled into the wall surface of the foundation pit, the blocking piece 9 is inserted in the discharge hole, the end part of the blocking piece 9 stretches into the inflow hole 12, one side of the blocking piece 9 positioned in the inflow hole 12 is provided with the wedge surface 10, the wedge surface 10 faces one side of the limiting block 7, a grouting pipe for grouting concrete mortar is inserted into the flow hole 12 during grouting, the wedge surface 10 is pushed in the grouting pipe inserting process, the blocking piece 9 slides in the discharge hole, one end of the blocking piece 9 provided with the wedge surface 10 slides into the discharge hole, during follow-up grouting, concrete mortar can enter the wedge surface 10 of the blocking piece 9 and give a certain pressure to the blocking piece 9 along the wedge surface 10, and the pressure of the blocking piece 9 subjected to the concrete mortar can be separated from the discharge hole, so that the concrete mortar flows out, and the grouting pipe is gradually extracted from the anchor rod 2 along with grouting.
S3, referring to FIG. 4, reinforcing ribs are welded on the embedded ribs 14 on the side surfaces of the adjacent pile bodies 1, specifically, the embedded ribs 14 can be embedded in the support pile during initial processing, the end parts of the embedded ribs 14 extend out of the side surfaces of the pile bodies 1, and after the dense mesh safety net 8 is fixed, the embedded ribs 14 on the side surfaces of the adjacent pile bodies 1 are connected through the reinforcing ribs (selected reinforcing steel bars), specifically, two ends of the reinforcing ribs are welded on the embedded ribs 14 on the pile bodies 1 on two sides of the reinforcing ribs respectively.
Reinforcing ribs are used as positioning, reinforcing steel meshes 6 are erected, the reinforcing steel meshes 6 are formed by binding reinforcing steel bars with diameters of 8-10mm, and the distance between adjacent reinforcing steel bars is not more than 20cm. The annular groove 13 that supplies the reinforcing bar card of reinforcing bar net piece 6 to go into has been seted up on the stopper 7, specifically, when setting up reinforcing bar net piece 6, through the location of stopper 7, set up initial reinforcing bar earlier in stopper 7 department (in-process, the strengthening rib also can be as initial reinforcing bar), with the example shown in fig. 4, make initial reinforcing bar card in the upside or the downside of stopper 7, then ligature other reinforcing bars and initial reinforcing bar cooperation formation reinforcing bar net piece 6, after the reinforcing bar net piece 6 is set up and is accomplished, weld initial reinforcing bar and stopper 7, then stopper 7 and reinforcing bar net piece 6 can realize mutual spacing, very big improvement and pile are with the joint strength of working face.
In combination with the illustration of fig. 1, after the steel bar meshes 6 between the pile bodies 1 are all erected, the end parts of the steel bar meshes 6 between adjacent pile bodies 1 are fixed through arc-shaped steel bars 5, and the arc-shaped steel bars 5 are wound on the outer sides of the pile bodies 1, so that the steel bar meshes 6 in the whole foundation pit are connected into a whole through the arc-shaped steel bars 5, and the supporting strength of the whole pile-to-pile working face is improved. Be fixed with a plurality of butt pieces 11 on the reinforcing bar net piece 6, specifically, butt piece 11 selects the steel sheet for use, welds butt piece 11 in reinforcing bar intersection department of reinforcing bar net piece 6 for butt piece 11 is located between reinforcing bar net piece 6 and close mesh formula safety net 8, and butt piece 11 is used for supporting close mesh formula safety net 8 on the face between the stake, further improves the fixed to close mesh formula safety net 8, in order to avoid close mesh formula safety net 8 protruding influence follow-up concrete spraying, in addition, reinforcing bar net piece 6 also can play the supporting role to the face between the stake.
And S4, spraying concrete towards the reinforcing mesh 6, wherein the concrete spraying is performed twice, and the first sprayed concrete layer covers the dense mesh type safety net 8 and the reinforcing mesh 6 on the working surface between piles to form a retaining wall. The concrete layer sprayed for the second time covers the protection wall formed by the first layer of spraying and is sprayed to the outer side of the pile body 1, and the arc-shaped steel bars 5 and the pile body 1 are covered completely to form a flat foundation pit inner wall.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. The construction method for the spray anchor among piles under the geological condition of sandy cobble is characterized by comprising the following steps of:
s1, cleaning a working surface between piles, so that the working surface between piles is free of sundries;
s2, paving a dense mesh type safety net on the working surface between piles, attaching the dense mesh type safety net to the working surface between piles, and fixing the dense mesh type safety net on the working surface between piles through a fixing structure;
s3, welding reinforcing ribs on the embedded ribs on the side surfaces of the adjacent pile bodies, connecting the embedded ribs on the side surfaces of the adjacent pile bodies by the reinforcing ribs, taking the reinforcing ribs as positioning, and erecting a reinforcing mesh;
and S4, spraying concrete towards the reinforcing mesh, wherein the sprayed concrete covers the dense mesh type safety net and the reinforcing mesh on the working surface between piles to form a retaining wall.
2. The method for the construction of the inter-pile anchor under the sandy pebble geological condition according to claim 1, wherein the mesh density of the dense mesh type safety net is not lower than 2000 meshes/100 cm 2 。
3. The method for constructing the inter-pile anchor under the sandy pebble geological condition according to claim 1, wherein the reinforcing mesh is formed by binding reinforcing steel bars with the diameter of 8-10mm, and the distance between adjacent reinforcing steel bars is not more than 20cm.
4. The construction method for spraying anchors among piles under the sandy pebble geological condition according to claim 1, wherein the fixed structure comprises an anchor rod, one end of the anchor rod is detachably connected with a limiting block, the other end of the anchor rod is provided with a conical insertion part, and spiral blades are fixed on the outer wall of the anchor rod; anchoring the anchor rods on the working surface between piles, forming perforations for the end parts of the anchor rods to pass through on the dense mesh type safety net, and then connecting limiting blocks to the anchor rods to fix the dense mesh type safety net.
5. The construction method for spraying anchors among piles under the geological condition of sandy pebbles according to claim 4, wherein the anchor rod is internally provided with flow holes along the axial direction of the anchor rod, and the side wall of the anchor rod is provided with a plurality of discharge holes communicated with the flow holes; and after the dense mesh safety net is installed, pouring concrete mortar into the flow holes.
6. The method for constructing the inter-pile anchor under the sandy pebble geological condition according to claim 5, wherein a block is inserted into the discharge hole, the end of the block extends into the through hole, and a wedge surface is arranged on the side of the block located in the through hole and faces the side of the limiting block.
7. The method for constructing the inter-pile anchor under the sandy pebble geological condition according to claim 4, wherein the limiting block is provided with an annular groove for clamping the reinforcing steel bars of the reinforcing steel bar net sheet, when the reinforcing steel bar net sheet is erected, an initial reinforcing steel bar is firstly erected at the limiting block by positioning the limiting block, then other reinforcing steel bars are bound to form the reinforcing steel bar net sheet, and after the erection is completed, the initial reinforcing steel bar and the limiting block are welded.
8. The method for constructing the anchor between piles under the geological condition of sandy pebbles according to claim 1, wherein the ends of the reinforcing meshes between the adjacent piles are fixed by arc-shaped reinforcing bars, the arc-shaped reinforcing bars are wound on the outer sides of the piles, the concrete spraying is performed in two times in the step S4, the reinforcing meshes are covered by the concrete sprayed for the first time, the reinforcing meshes are covered by the concrete sprayed for the second time, and the arc-shaped reinforcing bars are covered.
9. The method for constructing the inter-pile anchor under the sandy pebble geological condition according to claim 1, wherein a plurality of abutting blocks are fixed on the reinforcing mesh, the abutting blocks are positioned between the reinforcing mesh and the dense mesh type safety net, and the abutting blocks are used for abutting the dense mesh type safety net on the inter-pile working face.
10. The method for constructing the inter-pile anchor under the sandy pebble geological condition according to claim 1, wherein in the step S1, sand bags are filled in the concave portions on the inter-pile working faces so that the inter-pile working faces are flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311809069.4A CN117779788A (en) | 2023-12-26 | 2023-12-26 | Method for constructing spray anchors among piles under sandy pebble geological condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311809069.4A CN117779788A (en) | 2023-12-26 | 2023-12-26 | Method for constructing spray anchors among piles under sandy pebble geological condition |
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| Publication Number | Publication Date |
|---|---|
| CN117779788A true CN117779788A (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311809069.4A Pending CN117779788A (en) | 2023-12-26 | 2023-12-26 | Method for constructing spray anchors among piles under sandy pebble geological condition |
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| Country | Link |
|---|---|
| CN (1) | CN117779788A (en) |
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2023
- 2023-12-26 CN CN202311809069.4A patent/CN117779788A/en active Pending
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