Summary of the invention
The purpose of this utility model is to provide a kind of pit pile anchor breast wall concrete anchor cable hat girder construction, do not excavate the earthwork between two underground structures, and assurance is as the safety of placing of material place and vehicle transport passage, increase operation side and transport of materials facility, reduce the earthwork and dig freight volume and construction sequence, shorten the construction period.
For achieving the above object, the utility model adopts following technical scheme to realize:
Pit pile anchor breast wall concrete anchor cable hat girder construction, comprise slope protection pile, Guan Liang, anchor cable and coupling beam, this is the integral reinforced concrete structure formed by two row's slope protection pile, adjacent wall at two foundation ditches respectively is provided with the spaced slope protection pile of a row, be provided with prestressed anchor between the stake of adjacent slope protection pile, be provided with the waist rail of reinforcing use between the stake of every row's slope protection pile, the pile crown at every row's slope protection pile top links into an integrated entity by the Guan Liang of steel concrete, Guan Liang in two foundation pit slope protection stakes is connected by coupling beam, establish anchor cable in coupling beam, the anchor cable two ends are connected with Guan Liang by the backing plate beam ground tackle of coming of age, be distributed with reinforced mesh between slope protection pile.
In described reinforced mesh, be provided with by the cross-coupled horizontal bar of rinforcement bar and vertical muscle.
Described prestressed anchor is a kind of in prestress wire, solid anchor pole, hollow expansion type rock bolt or hollow grouting anchor.
Described slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, stir a kind of in slope protection pile, borehole slope protection pile or mechanical hole building slope protection pile.
Described waist rail can be steel wale, can be also reinforced concrete waist rail.
Compared with prior art, the beneficial effects of the utility model are: 1) adopt hat beam anchor cable structure that soil between two underground structures is effectively reinforced, firm bank protection system will be formed between two row's slope protection pile, having guaranteed soil body safety between structure, is that a kind of disposal cost is cheap, safe and reliable, the hat beam construction technology of simple and convenient easy row.2) between two adjacent foundation ditches, the soil body can be used for operation side stacking material and transport channel, has reduced excavation of foundation pit amount and backfill amount, has greatly shortened the construction period, has simplified construction sequence, has reduced cost, has accelerated programming.
The accompanying drawing explanation
Fig. 1 is the plan view from above of the utility model embodiment;
Fig. 2 is along A-A line sectional view in Fig. 1;
Fig. 3 is along B-B line sectional view in Fig. 2;
Fig. 4 is the structural representation of reinforced mesh in the utility model embodiment;
Fig. 5 is prestressed anchor anchor structure schematic diagram between the utility model slope protection pile;
Fig. 6 is the position relationship structural representation of reinforced mesh and anchor slab in the utility model embodiment;
Fig. 7 is the axial sectional view of Fig. 6;
Fig. 8 is Guan Liang in the utility model embodiment, slope protection pile and waist rail position elevational schematic view.
In figure: ground tackle 15-stake reinforcing bar 16-steel sleeve 17-waist rail between the vertical muscle 14-stake of 1-hat beam 2-slope protection pile 3-coupling beam 4-backing plate 5-hat beam ground tackle 6-anchor cable 7-PVC sleeve pipe 8-support 9-prestressed anchor 10-anchor slab 11-rinforcement bar 12-horizontal bar 13-
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment one step of the present utility model is illustrated:
See Fig. 1, Fig. 2, Fig. 3, it is the utility model pit pile anchor breast wall concrete anchor cable hat girder construction embodiment plan view from above, comprise hat beam 1, slope protection pile 2, anchor cable 6 and coupling beam 3, this is the integral reinforced concrete structure formed by two row's slope protection pile, respectively be provided with the spaced slope protection pile of a row 2 at two foundation pit side-walls, be provided with prestressed anchor 9 between the stake of adjacent slope protection pile 2, be provided with the waist rail 17 of reinforcing use between the stake of every row's slope protection pile 2, the pile crown at every row's slope protection pile 2 tops links into an integrated entity by the hat beam 1 of steel concrete, hat beam 1 in two foundation pit slope protection stakes is connected by coupling beam 3, establish anchor cable 6 in coupling beam 3, anchor cable 6 two ends by backing plate 4 come of age beam ground tackle 5 with the hat beam 1 be connected, 2 of slope protection pile are distributed with reinforced mesh.
See Fig. 4, be provided with in reinforced mesh by the cross-coupled horizontal bar 12 of rinforcement bar 11 and vertical muscle 13, vertical muscle 13 welds with stake reinforcing bar 15.
In embodiment, prestressed anchor is a kind of in prestress wire, solid anchor pole, hollow expansion type rock bolt or hollow grouting anchor.Slope protection pile is reinforced concrete revetment pile, immersed tube bored slope protection pile, stir a kind of in slope protection pile, borehole slope protection pile or mechanical hole building slope protection pile.Waist rail 17 can be steel wale, can be also reinforced concrete waist rail.
The job practices of the utility model pit pile anchor breast wall concrete anchor cable hat girder construction, its Specific construction step is:
1), at the inboard correspondence position of two predetermined foundation pit side-walls, concrete revetment pile 2 is arranged in interval construction one separately;
2) after slope protection pile 2 intensity reach 75% requirement, dig out in time slope protection pile 2 pile crown parts cubic metre of earth, the earthwork is dug to 100 ~ 150mm below coupling beam 3 elevation of bottoms;
3) water the C10 concrete cushion, abolish the pile crown concrete;
4) eject the center line of hat beam 1, the slope protection pile center line, eject the coupling beam center line;
5) see Fig. 5, the reinforcing bar of fabrication and installation hat beam 1, be extended down to stake reinforcing bar 15 in hat beam 1;
6) the PVC sleeve pipe 7 in the steel sleeve 16 of pre-buried anchor cable 6 use, backing plate 4 and coupling beam, establish PVC sleeve pipe 7 in steel sleeve 16, and steel sleeve 16 loads are on support 8, and the bottom surface of support 8 bottom surfaces and coupling beam 3 is contour;
7) template is installed and is reinforced, cast hat beam 1 and coupling beam 3 concrete maintenance;
8) after hat beam 1 intensity reaches 80%, anchor cable 6 to be installed and to be started the pit earthwork excavation, excavation is to the position of anchor pole 9;
9) carry out prestressed anchor 9 punching construction 2 of slope protection pile, cast runs through a section of waist rail 17 by prestressed anchor 9 and smears sliding agent front, and then the prestressed anchor pole 9, mortar depositing construction, and slip casting is to anchor slab 10 places;
10) cleaning of the inter-pile soil body at prestressed anchor 9 positions is rejected totally, the inter-pile soil body of the pile body of both sides slope protection pile 2 and rejecting is cleaned out;
11) see Fig. 6, by beyond prestressed anchor 9 grouting ports, to one section, the stake outside, being coated with sliding agent, have prestressed anchor 9 two ends of sleeve pipe to be inserted in anchor slab 10 in cover, anchor slab 10 permanent positions are in the inboard 100mm scope of slope protection pile outside joint face;
12) see Fig. 7, at horizontal bar 12 and the vertical muscle 13 of anchor slab 10 outside assembling reinforcement net sheets, fixing spilled water hole, sprayed mortar, between stake, ground tackle 14 is positioned at the end of prestressed anchor 9;
13) see Fig. 8, waist rail 17 is installed, ground tackle between stake is installed, the stretch-draw prestressing force anchor pole, waist rail 17 is used for reinforcing the slope protection pile 2 of hat beam 1 below;
14), after completing waist rail, can carry out next step foundation ditch digging.