CN202466594U - Horizontal jet grouting soil anchoring and cast-in-place pile compound foundation pit supporting structure - Google Patents

Horizontal jet grouting soil anchoring and cast-in-place pile compound foundation pit supporting structure Download PDF

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Publication number
CN202466594U
CN202466594U CN2011205633712U CN201120563371U CN202466594U CN 202466594 U CN202466594 U CN 202466594U CN 2011205633712 U CN2011205633712 U CN 2011205633712U CN 201120563371 U CN201120563371 U CN 201120563371U CN 202466594 U CN202466594 U CN 202466594U
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CN
China
Prior art keywords
pile
jet grouting
anchor
foundation pit
anchoring
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CN2011205633712U
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Chinese (zh)
Inventor
陈宝弟
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标力建设集团有限公司
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Publication of CN202466594U publication Critical patent/CN202466594U/en

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Abstract

The utility model belongs to the technical field of supporting of foundation pits of high-rise buildings, in particular to a horizontal jet grouting soil anchoring and cast-in-place pile compound foundation pit supporting structure, wherein a water stop stirring pile is arranged on the side wall of the foundation pit of a building; a bored cast-in-place pile is arranged at the inner side of a water stop curtain formed by the water stop stirring pile; a ring beam is arranged on the top of the bored cast-in-place pile; anchor piles passing through the bored cast-in-place pile or/and the ring beam and downwardly extending in a horizontal or inclined manner are arranged both on the inner side walls of the bored cast-in-place pile and the ring beam; one ends of steel strands in the anchor piles are fixed on the bored cast-in-place pile and the ring beam; the other ends of the steel strands in the anchor piles are connected with anchor discs fixed at the end parts of the anchor piles; and a stirring pile submerged pier and a bearing platform for reinforcing are arranged at the bottom of the foundation pit. The horizontal jet grouting soil anchoring and cast-in-place pile compound foundation pit supporting structure disclosed by the utility model has the advantages that the anchor piles with higher intensity are formed by adopting a high-pressure jet grouting construction process; the steel strands and the anchor discs are additionally arranged in the anchor piles; pre-stress is applied, so that the initial deformation of the earth surface can be effectively controlled under the common function of the steel strands and the jet grouting cement soil body; and the horizontal jet grouting soil anchoring and cast-in-place pile compound foundation pit supporting structure is applied to development and utilization of urban underground spaces.

Description

Horizontal jet grouting soil anchor and the compound foundation pit supporting construction of castinplace pile

Technical field

The utility model belongs to the Base hole supporting technology field of highrise building, refers in particular to a kind of horizontal jet grouting soil anchor and the compound foundation pit supporting construction of castinplace pile.

Background technology

In China southeastern coastal areas, along with the fast development of urban construction, highrise building and super highrise building continue to bring out; Because of the needs of 26S Proteasome Structure and Function, generally all establish one to three layer of basement, the most of weak soil property that belongs in coastal area; Its geological structure is generally: cultivated soil or the miscellaneous fill of planting that 1 meter left and right sides, top layer is thick; Being 1~2 meter thick clay below the topsoil, is tens meters thick silt soils or mucky soil below the clay, because coastal area greater coasting area soil property extreme difference particularly; The general foundation ditch of the degree of depth more than 6 meters all will adopt bored pile to add the interior supporting and protection structure that supports; This foundation pit supporting construction overall security is better, but has following shortcoming: concrete backing material consumption is big, need add the high braced structuress of cost such as stand column pile, lattice column; Shoveling speed is affected, and the earthwork often need repeatedly be turned over fortune, influences the duration; Increased and torn support open, change support technology, and tearing support open, to change support unreasonable,, also can exert an influence agent structure except that causing the foundation pit side-wall distortion increases; To the overlarge area foundation ditch, interior support implements to have certain difficulty.

Summary of the invention

The purpose of the utility model provides and is adapted at coastal soft clay area mud than using under the heavy back matter condition; Cost is less, the duration is short, construction technology is reasonable; The distortion of the strict control of ability foundation ditch can be to native anchor of the horizontal jet grouting that agent structure exerts an influence and the compound foundation pit supporting construction of castinplace pile.

The purpose of the utility model is achieved in that horizontal jet grouting soil anchor and the compound foundation pit supporting construction of castinplace pile; The sidewall of the foundation ditch of building is provided with the sealing agitation pile; The inboard of the water-stop curtain that the sealing agitation pile forms is provided with bored pile; The top of bored pile is provided with collar tie beam; The inside wall of bored pile and collar tie beam is provided with and passes bored pile or/and the anchoring pile of collar tie beam and level or oblique down abduction, and an end of the steel strand in the anchoring pile is fixed on bored pile or the collar tie beam, the other end is connected with the anchor dish that is fixed on the anchoring pile end, and the bottom of foundation ditch is provided with the agitation pile sub-merged pier and the cushion cap of reinforcing usefulness.

The anchoring pile of the inside wall setting of bored pile can be provided with a plurality of according to foundation depth.

The one-tenth anchor mode of above-mentioned anchoring pile is a horizontal jet grouting soil anchor, and its used drill bit is three leaf drill bits.

Bear down on one collar tie beam anchoring locking of the steel strand utilization of the anchoring pile on the above-mentioned inside wall that is arranged on collar tie beam, the waist rail that bored pile is close in the steel strand utilization that is arranged on the anchoring pile on the inside wall of bored pile locks.

Be provided with the slope between the above-mentioned foundation ditch and the face of land or be provided with the slope and transition platform, the arranged outside of upper end, slope has the gutter.

The surface of the transitional region between above-mentioned gutter to the foundation ditch is provided with steel concrete surface layer.

The utility model is compared the outstanding and beneficial technical effects of prior art:

1, the present invention is that horizontal jet grouting soil anchor replaces interior support through a kind of steel strand and cement-soil composite earth anchor structure of novel large pulling resistance; Horizontal jet grouting soil anchor can be through applying prestressing force to steel strand; Effectively control the deformation values of supporting and protection structure, this support construction is convenient, and cost is low; Safe and help carrying out of postorder digging, have good social benefit and economic benefit.

2, the stretching force of horizontal jet grouting soil anchor of the present invention can be confirmed through pulling test; Every steel strand all pass through tensioning fixation when construction; The tensioning fixation value is the anchored force of insolation level churning soil anchor effectively, therefore can guarantee the construction quality and the safety of supporting and protection structure, and horizontal jet grouting soil anchor construction technology is simple; Little to construction operation face requisite space, construction speed is very fast.

3, the present invention adopts high-pressure rotary-spray construction technology to form the higher anchoring pile of intensity (construction of horizontal jet grouting soil anchor forms); In anchoring pile, add steel strand and anchor dish (anchor ingot plate); And apply prestressing force, and make steel strand and the acting in conjunction of the churning cement soil body, can effectively control the distortion on the face of land.

4, the present invention reinforces original soil around the foundation ditch through the anchoring pile that many row of horizontal churning soil anchor forms; Cohesion in the soil body (C) and angle of internal friction (φ) value all improve; Consolidation effect to soft soil is that general anchor pole and soil nailing are beyond one's reach, and the anchoring pile body cooperates with steel strand and anchor dish (anchor ingot plate) in the anchoring pile, forms very high anchored force; And under the effect of steel strand prestress; Increase substantially bending resistance, the shear strength of cement-soil, supported in the anchoring pile that utilizes horizontal jet grouting soil anchor to mold simultaneously replaces, reduced the cost of going along with sb. to guard him engineering.

5, the present invention has good Deformation control ability and advantages of higher stability; Be specially adapted to foundation pit deformation strict demand arranged, can't adopt inner supporting structure, put that sloping condition is limited, cutting depth is at 15 meters overlarge area foundation pit supporting projects with interior soft clay area; Compare with traditional interior support supporting and to have very big economic advantages, and construction speed is fast, is out of shape little safe simultaneously; The maximum displacement of the deep layer soil body is little; Construction period is very little to the influence of town road pipeline on every side, is fit to very much the national conditions of China, has adapted to urban underground space and has developed continuous Development Trend requirement.

Description of drawings

Fig. 1 is the horizontal jet grouting soil anchor and the compound pattern foundation pit supporting structure schematic diagram of castinplace pile of the utility model.

Fig. 2 is the rotary jet stirring anchoring pile drill bit sketch map of the utility model.

Fig. 3 is the anchoring pile cross sectional representation of the utility model.

Fig. 4 is the anchor pole of the utility model use and the sketch map of waist rail.

Among the figure: 1, the soil body; 1a, miscellaneous fill layer; 1b, argillic horizon; 1c, mud; 1d, c-1 farinose argillic horizon; 1e, c-2 farinose argillic horizon; 1f, c-3 argillic horizon; 1g, d-1 argillic horizon; 2, gutter; 3, steel concrete surface layer; 4, sealing agitation pile; 5, collar tie beam; 6, steel strand; 7, drilled pile; 8, waist rail; 9, cushion cap; 10, hole end agitation pile sub-merged pier; 11, anchoring pile; 12, slope; 13, the face of land; 14, foundation ditch; 15, transition platform; 16, preset building; 20, three leaf drill bits; 21, nozzle; 22, anchor dish; 23, drilling rod; 24, steel strand; 25, extruding anchor; 31, rotary churning pile; 41, steel plate; 42, ground tackle;

The specific embodiment

The utility model is further described with specific embodiment below in conjunction with accompanying drawing, referring to Fig. 1-4;

Horizontal jet grouting soil anchor and the compound foundation pit supporting construction of castinplace pile; The sidewall of the foundation ditch 14 of building is provided with sealing agitation pile 4; The inboard of the water-stop curtain that sealing agitation pile 4 forms is provided with bored pile 7; The top of bored pile 7 is provided with collar tie beam 5; The inside wall of bored pile 7 and collar tie beam 5 is provided with and passes bored pile 7 or/and collar tie beam 5 and level or the oblique anchoring pile 11 of abduction down, and an end of the steel strand 6 in the anchoring pile 11 is fixed on bored pile 7 or the collar tie beam 5, the other end is connected with the anchor dish 22 that is fixed on anchoring pile 11 ends, and the bottom of foundation ditch 14 is provided with the agitation pile sub-merged pier 10 and the cushion cap 9 of reinforcing usefulness.

The anchoring pile 11 of the inside wall setting of bored pile 7 can be provided with a plurality of according to foundation ditch 14 degree of depth.

The one-tenth anchor mode of above-mentioned anchoring pile 11 is a horizontal jet grouting soil anchor, and its used drill bit 20 is three leaf drill bits.

The collar tie beam anchoring locking of bearing down on one of the steel strand 6 of the anchoring pile 11 on the above-mentioned inside wall that is arranged on collar tie beam 5 utilization, the steel strand 6 that are arranged on the anchoring pile 11 on the inside wall of bored pile 7 utilize the waist rail 8 of being close to bored pile 7 to lock.

Be provided with slope 12 between the above-mentioned foundation ditch 14 and the face of land or be provided with slope 12 and transition platform 15, the arranged outside of 12 upper ends, slope has gutter 2.

The surface of the transitional region between above-mentioned gutter 2 to the foundation ditch 14 (zone on gutter 2 to slope 12, slope 12 and transition platform 15 threes zone summation) is provided with steel concrete surface layer 3.

The construction point of collar tie beam of the present invention: should bored pile stake top laitance be cut before the collar tie beam construction and clean out; And strict control absolute altitude; The body that collar tie beam is put in horizontal jet grouting soil anchor position at the envelope mould with before watering concrete is that φ 100PVC manages, and steel strand penetrate in the pipe, so that stretch-draw; Build at concrete and to protect pvc pipe in the process of vibrating, prevent in the cement paste inflow pipe.

The principle of support system of the present invention:

1. horizontal jet grouting soil anchor and bored pile form support system through the shaped steel waist rail, and this support system is controlled foundation pit deformation through integral rigidity.Keep off soil through bored pile on the one hand; On the other hand; The power of supporting and protection structure being born through horizontal jet grouting soil anchor passes to good ground; Horizontal jet grouting soil anchor is the principle according to high-pressure rotary jet grouting pile, in soil layer, forms level to cement soil pile with the rotary jet stirring method, and in churning, stir, insert simultaneously when creeping into steel strand and form the native anchor of horizontal jet grouting.

2. through horizontal jet grouting soil anchor is applied tension stress, improve the bond stress of steel strand and anchoring body, reduce soil deformation, and the acting in conjunction of steel strand intensity, make anchoring system keep stable.

3. count row of horizontal churning soil anchor the active region soil body is reinforced, make active region form a semirigid similar gravity soil-baffling structure, effectively improve the foundation ditch safety.

4. according to the poor especially characteristics of coastal area weak soil soil property; Establish 1~2 row's sealing agitation pile (cement mixing pile) in the bored pile outside and form the water-stop curtain wall; The sealing agitation pile plays retaining inter-pile soil (going along with sb. to guard him bored pile) and sealing; Hole end passive area is provided with number row agitation pile (sub-merged pier), reduces deep soil displacement body and bottom heave.

The foregoing description is merely the preferred embodiment of the utility model, is not the protection domain that limits the utility model according to this, so: the equivalence that all structures according to the utility model, shape, principle are done changes, and all should be covered by within the protection domain of the utility model.

Claims (5)

1. horizontal jet grouting soil anchor and the compound foundation pit supporting construction of castinplace pile; It is characterized in that: the sidewall of the foundation ditch of building is provided with the sealing agitation pile; The inboard of the water-stop curtain that the sealing agitation pile forms is provided with bored pile; The top of bored pile is provided with collar tie beam; The inside wall of bored pile and collar tie beam is provided with and passes bored pile or/and the anchoring pile of collar tie beam and level or oblique down abduction, and an end of the steel strand in the anchoring pile is fixed on bored pile or the collar tie beam, the other end is connected with the anchor dish that is fixed on the anchoring pile end, and the bottom of foundation ditch is provided with the agitation pile sub-merged pier and the cushion cap of reinforcing usefulness.
2. horizontal jet grouting soil anchor according to claim 1 and the compound foundation pit supporting construction of castinplace pile is characterized in that: the one-tenth anchor mode of described anchoring pile is a horizontal jet grouting soil anchor, and its used drill bit is three leaf drill bits.
3. horizontal jet grouting soil anchor according to claim 1 and the compound foundation pit supporting construction of castinplace pile; It is characterized in that: the steel strand utilization of the anchoring pile on the described inside wall that the is arranged on collar tie beam collar tie beam anchoring locking of bearing down on one, the waist rail that bored pile is close in the steel strand utilization that is arranged on the anchoring pile on the inside wall of bored pile locks.
4. horizontal jet grouting soil anchor according to claim 1 and the compound foundation pit supporting construction of castinplace pile is characterized in that: be provided with the slope between the described foundation ditch and the face of land or be provided with the slope and transition platform, the arranged outside of upper end, slope has the gutter.
5. horizontal jet grouting soil anchor according to claim 4 and the compound foundation pit supporting construction of castinplace pile, it is characterized in that: the surface of the transitional region between described gutter to the foundation ditch is provided with steel concrete surface layer.
CN2011205633712U 2011-12-29 2011-12-29 Horizontal jet grouting soil anchoring and cast-in-place pile compound foundation pit supporting structure CN202466594U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205633712U CN202466594U (en) 2011-12-29 2011-12-29 Horizontal jet grouting soil anchoring and cast-in-place pile compound foundation pit supporting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205633712U CN202466594U (en) 2011-12-29 2011-12-29 Horizontal jet grouting soil anchoring and cast-in-place pile compound foundation pit supporting structure

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103015436A (en) * 2013-01-01 2013-04-03 中国建筑西南勘察设计研究院有限公司 Cemented-type water-blocking curtain and anchor pulling pile compounded supporting structure
CN103526763A (en) * 2013-09-22 2014-01-22 中冶天工上海十三冶建设有限公司 Cast-in-place pile, root pile and jet grouting pile composite-type foundation pit supporting method
CN104863613A (en) * 2015-03-04 2015-08-26 中铁隧道勘测设计院有限公司 High-side-wall anchored primary support structure for rock strata underground excavation underground structure, and construction method of high-side-wall anchored primary support structure
CN105040595A (en) * 2015-07-28 2015-11-11 中国十九冶集团有限公司 Retaining structure of foundation pit for main pier bearing platform of bridge at river bedrock on gentle slope and construction method thereof
CN106120808A (en) * 2016-07-28 2016-11-16 上海宝冶集团有限公司 A kind of in the soft comprehensive support method moulded in clay foundation ditch
CN107740425A (en) * 2017-10-18 2018-02-27 上海宝冶集团有限公司 Revolve cast anchor rope foundation pit supporting construction and its construction method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103015436A (en) * 2013-01-01 2013-04-03 中国建筑西南勘察设计研究院有限公司 Cemented-type water-blocking curtain and anchor pulling pile compounded supporting structure
CN103015436B (en) * 2013-01-01 2015-07-08 中国建筑西南勘察设计研究院有限公司 Cemented-type water-blocking curtain and anchor pulling pile compounded supporting structure
CN103526763A (en) * 2013-09-22 2014-01-22 中冶天工上海十三冶建设有限公司 Cast-in-place pile, root pile and jet grouting pile composite-type foundation pit supporting method
CN104863613A (en) * 2015-03-04 2015-08-26 中铁隧道勘测设计院有限公司 High-side-wall anchored primary support structure for rock strata underground excavation underground structure, and construction method of high-side-wall anchored primary support structure
CN105040595A (en) * 2015-07-28 2015-11-11 中国十九冶集团有限公司 Retaining structure of foundation pit for main pier bearing platform of bridge at river bedrock on gentle slope and construction method thereof
CN106120808A (en) * 2016-07-28 2016-11-16 上海宝冶集团有限公司 A kind of in the soft comprehensive support method moulded in clay foundation ditch
CN107740425A (en) * 2017-10-18 2018-02-27 上海宝冶集团有限公司 Revolve cast anchor rope foundation pit supporting construction and its construction method

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