CN103790185A - Shock insulation groove enclosure wall for deep foundation shock insulation structure and constructing method of shock insulation groove enclosure wall - Google Patents
Shock insulation groove enclosure wall for deep foundation shock insulation structure and constructing method of shock insulation groove enclosure wall Download PDFInfo
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Abstract
The invention discloses a shock insulation groove enclosure wall for a deep foundation shock insulation structure and a constructing method of the shock insulation groove enclosure wall. One end of each anchor rope is inserted into a site soil layer in a downward inclining mode, and the other end of each anchor rope penetrates through a gap between two adjacent supporting piles and is anchored to the anchor end of a steel waist beam. Embedded part anchor plates are fixed to a reinforcement cage of the supporting piles, one end of each embedded part reinforcing steel bar is fixed to the inner face of the corresponding embedded part anchor plate, the other end of each embedded part reinforcing steel bar is inserted into a pile body of the corresponding supporting pipe, steel rib plates are vertically fixed to the outer side of each embedded part anchor plate side by side, horizontal U-shaped openings are formed in the edge, facing towards a building body structure, of each steel rib plate at intervals, and the lower portion of each steel rib plate is welded to a raft reinforcing steel bar of a corresponding foundation raft. External discharge horizontal reinforcing steel bars of external retaining walls are distributed in the horizontal U-shaped openings of the steel rib plates, and horizontal reinforcing steel bars of transverse retaining walls are welded to the corresponding steel rib plates. A pile and anchor system, the cast-in-place reinforced concrete retaining walls and the raft foundation are connected into a whole, and therefore the shock insulation groove enclosure wall which is used for the deep foundation shock insulation structure and has good force bearing performance is formed, and the shock insulation groove enclosure wall can be suitable for the deep foundation shock insulation structure with a multi-storey basement.
Description
Technical field
The present invention relates to a kind of shock insulation ditch enclosure wall and constructive method thereof of isolation structure.
Background technology
Earthquake is as a kind of natural calamity, and the disaster that earthquake causes has caused huge disaster to the mankind.The method of traditional architecture design antidetonation adopts strengthens structure, strengthen sectional dimension of members, increase reinforced component, improve the method for " firmly anti-" such as the rigidities of structure and resist earthquake, but because earthquake has randomness, earthquake magnitude has uncertainty, adopt the anti-shock methods of tradition " firmly anti-" to design by actual earthquake intensity, the performance objective of building structure inherently safe and personal security might not be guaranteed, and is more difficult to Earthquake occurrence control secondary disaster and realizes valuable property safety performance target.
At present, isolation structure is owing to effectively reducing the seismic damage of building, and application is more and more.Seismic Isolation of Isolation Layer is arranged on to the isolation structure at middle part, house, it has the performance requirement higher than non-isolation structure to the structural element below Seismic Isolation of Isolation Layer, and this type of Isolating Building all should be taked special treatment measures to equipment pipe circuits such as vertical means of transportation (elevator, staircase, stair etc.), fire fighting device, heating, water supply, power supply, security protections, design and construction difficulty is all larger.The base isolation that Seismic Isolation of Isolation Layer is arranged between basis and superstructure is one of shock isolation method the most favourable in isolation structure.
Base isolation structure: arrange between house base foundation and superstructure by the parts such as rubber earthquake isolation support and damping unit and form and there is the structure that the Seismic Isolation of Isolation Layer of integral reset function forms, expect shockproof object to reach.
For the base isolation structure with basement, due to the needs of shock insulation, Seismic Isolation of Isolation Layer must be set building and basis are separated, shock insulation ditch is set simultaneously and will builds and Site Soil disengagement around, this just need to arrange the shock insulation ditch enclosure wall of isolation structure.The shock insulation ditch enclosure wall of isolation structure generally adopts free lower end, upper end and the fixed cantilever retaining wall of basic raft plate.Retaining wall mainly bears its soil, water pressure behind, and soil, water pressure are that horizontal force is Triangle-Profile, the maximum uniform horizontal loading q=Krh in bottom; The horizontal distortion f=qh of its end of encorbelmenting
4/ 30EI=Krh
5/ 30EI; Root bending moment M=qh
2/ 6=Krh
3/ 30; Wherein K is soil, coefficient of water pressure, and r is that soil, water severe, E are that retaining wall elastic model, I are that retaining wall second moment of area, h are the retaining wall degree of depth.So along with the increase of the cantilever degree of depth, horizontal movement and the root bending moment of retaining wall sharply increase.
For the base isolation structure of single floor basement, space enclosing structure cantilever retaining wall jib-length is less, is easy to realize.For the basement number of plies more (being not less than 2 layers), base isolation structure that shock insulation trench depth is large, the length of the cantilever of its shock insulation ditch enclosure wall is very long, conventional concrete cantilever retaining wall be difficult to realize or cost too large.
The shock insulation ditch enclosure wall of existing base isolation structure is only applicable to shallow foundation isolation structure.For the shock insulation ditch enclosure wall of deep foundation isolation structure, under horizontal soil, effect of water pressure, produce very large root bending moment, cantilever end produces very large horizontal distortion, is difficult to meet the designing requirement of the base isolation structure space enclosing structure with multi-storey basement.
Summary of the invention
The invention provides a kind of shock insulation ditch enclosure wall and constructive method thereof of deep foundation isolation structure, solve the pile-anchor system of existing shock insulation ditch enclosure wall and retaining wall without contact, jointly not stressed, retaining wall is prone to horizontal distortion, is difficult to meet the technical problem of deep foundation shock insulation Design of Retaining Structure requirement.
The technical solution adopted for the present invention to solve the technical problems is:
The shock insulation ditch enclosure wall of this deep foundation isolation structure, comprise pile-anchor supporting system, cast-in-situ concrete retaining wall and the top Guan Liang of excavation of foundation pit, pile-anchor supporting system comprises soldier pile, anchor cable and waist rail, the downward-sloping insertion site soil layers in anchor cable one end, the other end is anchored at the anchored end on steel waist rail through adjacent two soldier pile spaces;
The reinforcing cage outside of described soldier pile is fixed with built-in fitting anchor slab, built-in fitting reinforcing bar one end is fixed on built-in fitting anchor slab inner face, the other end stretches into soldier pile pile body inside, built-in fitting anchor slab outside is vertically fixed with steel floor side by side, steel floor has horizontal U-shaped mouth towards the interval, one side of major structure of construction, the raft slab muscle welding of steel floor bottom and corresponding basic raft plate;
Described retaining wall is the lattice type retaining wall being connected into by outer retaining wall, strut rail cob wall and interior retaining wall, strut rail cob wall is connected between outer retaining wall and interior retaining wall and soldier pile corresponding position, the outer row of horizontal reinforcing bar of outer retaining wall is arranged in the horizontal U-shaped mouth of steel floor, and the horizontal reinforcement of strut rail cob wall welds with corresponding steel floor;
Sprayed mortar surface between described soldier pile on site soil layers sidewall is pasted with waterproof roll, between waterproof roll and outer retaining wall, is provided with polyphenyl topping;
Described top Guan Liang is located at soldier pile and retaining wall top.
Described soldier pile adopts single stake or double-row pile.
The height that the height of described built-in fitting anchor slab is not less than retaining wall adds basic plank thickness.
Every limit, horizontal section of described built-in fitting anchor slab than strut rail cob wall wide go out 20 ~ 40mm.
Described steel waist rail is surrounded by concrete breast beam outward, and concrete breast beam and outer retaining wall are built and be integrated.
Described strut rail cob wall bottom has cross wall inspection manhole.
Described top Guan Liang adopts cast-in-situ concrete beam or cast-in-situ reinforced concrete slab.
The constructive method of the shock insulation ditch enclosure wall of this deep foundation isolation structure, construction sequence is as follows:
Step 2, carries out soldier pile construction, guarantees built-in fitting accurate positioning;
Step 3, carries out excavation of foundation pit and precipitation operation, the anchor cable of constructing in digging process, and the downward-sloping insertion site soil layers in anchor cable one end, the other end is anchored at the anchored end on steel waist rail through adjacent two soldier pile spaces; Stretch-draw anchor, and the condition of reserved anchor cable two times tensioning;
Described step 7, construction retaining wall starts on basic raft plate, construct Seismic Isolation of Isolation Layer and major structure of construction simultaneously;
After described step 9, continue construction building agent structure, stop precipitation.
Beneficial effect of the present invention is as follows:
The present invention is directed to the base isolation structure that the basement number of plies is many, the degree of depth is large, pile-anchor supporting system and cast-in-place concrete wall are connected as a single entity, form the piled anchor combined enclosure wall of deep foundation isolation structure.Piled anchor structural system is not only as the temporary support structures of Excavation Process, and as the important component part of isolation structure enclosure wall.Due to the existence of prestressed anchor, provide one with the horizontal pull of soil water pressure opposite direction, can effectively change the stress performance of shock insulation ditch enclosure wall, structural safety performance, structural redundancy degree, resistance to capsizing all improve a lot.
The present invention, by connect built-in fitting and steel floor on soldier pile, is connected retaining wall with soldier pile, raft plate is connected with soldier pile, can make the co-operation such as pile-anchor system, retaining wall, raft plate.Concrete breast beam and retaining wall are built simultaneously, as the external wrapping concrete member of pile-anchor system steel waist rail, have improved anchoring strength simultaneously.
The present invention makes full use of temporary support structures as permanent structure, considers the acting in conjunction of piled anchor, cast-in-situ concrete retaining wall, raft plate.Compared with not considering the common cantilever retaining wall of piled anchor advantageous effect, the present invention can effectively reduce thickness, minimizing floor space, the construction costs that reduces of retaining wall.Reasonable stress of the present invention, be convenient to implement, can guarantee safety and the resistance to capsizing of space enclosing structure system.Compared with cantilever retaining wall, space enclosing structure horizontal distortion is little, and ability is toppled much larger than cantilever retaining wall in structure hole, has stronger shock resistance simultaneously.
The present invention is by being linked as entirety using pile-anchor system, cast-in-situ steel reinforced concrete retaining wall, raft foundation as temporary lining, jointly stressed, formation has the shock insulation ditch enclosure wall of the deep foundation isolation structure of good stress performance, can be applicable to have the deep foundation isolation structure of multi-storey basement.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is structural representation of the present invention.
Fig. 2 is detail of construction of the present invention.
Fig. 3 is the structural representation of A-A section in Fig. 2.
Fig. 4 is the structural representation of B-B section in Fig. 2.
Fig. 5 is the constructional detail of piling wall connected node.
Fig. 6 is the structural representation of C-C section in Fig. 5.
Reference numeral: 1-soldier pile, 2-anchor cable, 3-steel waist rail, 3.1-anchored end, the outer retaining wall of 4-, the outer row of horizontal reinforcing bar of 4.1-, 4.2-vertical reinforcement, 5-strut rail cob wall, 5.1-horizontal reinforcement, 5.2-vertical reinforcement, retaining wall in 6-, 7-steel floor, the horizontal U-shaped mouth of 7.1-, 8-basis raft plate, 9-shock insulation ditch, 10-cross wall inspection manhole, 11-Seismic Isolation of Isolation Layer, 12-major structure of construction, 13-retaining wall and soldier pile connected node, 14-site soil layers, 15-waterproof roll, 16-polyphenyl topping, 17-top Guan Liang, 18-built-in fitting anchor slab, 19-built-in fitting reinforcing bar.
The specific embodiment
Embodiment is referring to shown in Fig. 1～6, the shock insulation ditch enclosure wall of this deep foundation isolation structure, comprise pile-anchor supporting system, cast-in-situ concrete retaining wall and the top hat beam 17 of excavation of foundation pit, pile-anchor supporting system comprises soldier pile 1, anchor cable 2 and waist rail 3, the anchor cable 2 downward-sloping insertion site soil layers 14 in one end, the other end is anchored at the anchored end 3.1 on steel waist rail 3 through adjacent two soldier pile 1 spaces.Steel waist rail 3 is outer is surrounded by concrete breast beam, and concrete breast beam and outer retaining wall 4 are built and be integrated.
Shown in Fig. 5, Fig. 6, described soldier pile 1 adopts single stake or double-row pile, preferred single stake.The reinforcing cage outside of soldier pile 1 is fixed with built-in fitting anchor slab 18, and the height that the height of built-in fitting anchor slab 18 is not less than retaining wall adds basic plank thickness.Every limit, horizontal section of built-in fitting anchor slab 18 than strut rail cob wall 5 wide go out 20～40mm.Built-in fitting reinforcing bar 19 one end are fixed on built-in fitting anchor slab 18 inner faces, the other end stretches into soldier pile 1 pile body inside, built-in fitting anchor slab 18 outsides are vertically fixed with steel floor 7 side by side, steel floor 7 has horizontal U-shaped mouth 7.1 towards the interval, one side of major structure of construction 12, the raft slab muscle welding of steel floor 7 bottoms and corresponding basic raft plate 8.
Shown in Fig. 1～4, described retaining wall is the lattice type retaining wall being connected into by outer retaining wall 4, strut rail cob wall 5 and interior retaining wall 6, strut rail cob wall 5 is connected between outer retaining wall 4 and interior retaining wall 6 and soldier pile 1 corresponding position, described strut rail cob wall 5 bottoms have cross wall inspection manhole 10, the outer row of horizontal reinforcing bar 4.1 of outer retaining wall 4 is arranged in the horizontal U-shaped mouth 7.1 of steel floor 7, and the horizontal reinforcement 5.1 of strut rail cob wall 5 welds with corresponding steel floor 7.Retaining wall also can adopt common monolithic entities retaining wall.
Shown in Figure 5, the sprayed mortar surface between described soldier pile 1 on site soil layers 14 sidewalls is pasted with waterproof roll 15, between waterproof roll 15 and outer retaining wall 4, is provided with polyphenyl topping 16.
Shown in Fig. 1, Fig. 2, described top hat beam 17 is located at soldier pile 1 and retaining wall top.Described top hat beam 17 adopts cast-in-situ concrete beam or cast-in-situ reinforced concrete slab.
The constructive method of the shock insulation ditch enclosure wall of this deep foundation isolation structure, construction sequence is as follows:
Step 2, carries out soldier pile 1 and constructs, and guarantees built-in fitting accurate positioning;
Step 3, carries out excavation of foundation pit and precipitation operation, the anchor cable of constructing in digging process, and the anchor cable 2 downward-sloping insertion site soil layers 14 in one end, the other end is anchored at the anchored end 3.1 on steel waist rail 3 through adjacent two soldier pile 1 spaces; Stretch-draw anchor, and the condition of reserved anchor cable two times tensioning;
Described step 7, construction retaining wall starts on basic raft plate 8, construct Seismic Isolation of Isolation Layer 11 and major structure of construction 12 simultaneously;
After described step 9, continue construction building agent structure 12, stop precipitation.
Claims (10)
1. the shock insulation ditch enclosure wall of a deep foundation isolation structure, comprise pile-anchor supporting system, cast-in-situ concrete retaining wall and the top Guan Liang (17) of excavation of foundation pit, pile-anchor supporting system comprises soldier pile (1), anchor cable (2) and waist rail (3), the downward-sloping insertion site soil layers in anchor cable (2) one end (14), the other end is anchored at the anchored end (3.1) on steel waist rail (3) through adjacent two soldier piles (1) space, it is characterized in that:
The reinforcing cage outside of described soldier pile (1) is fixed with built-in fitting anchor slab (18), built-in fitting reinforcing bar (19) one end is fixed on built-in fitting anchor slab (18) inner face, the other end stretches into soldier pile (1) pile body inside, built-in fitting anchor slab (18) outside is vertically fixed with steel floor (7) side by side, steel floor (7) has horizontal U-shaped mouth (7.1) towards the interval, one side of major structure of construction (12), the raft slab muscle welding of steel floor (7) bottom and corresponding basic raft plate (8);
Described cast-in-situ concrete retaining wall is the lattice type retaining wall being connected into by outer retaining wall (4), strut rail cob wall (5) and interior retaining wall (6), strut rail cob wall (5) is connected between outer retaining wall (4) and interior retaining wall (6) and soldier pile (1) corresponding position, the outer row of horizontal reinforcing bar (4.1) of outer retaining wall (4) is arranged in the horizontal U-shaped mouth (7.1) of steel floor (7), and the horizontal reinforcement (5.1) of strut rail cob wall (5) welds with corresponding steel floor (7);
Sprayed mortar surface between described soldier pile (1) on site soil layers (14) sidewall is pasted with waterproof roll (15), between waterproof roll (15) and outer retaining wall (4), is provided with polyphenyl topping (16);
Described top Guan Liang (17) is located at soldier pile (1) and retaining wall top.
2. the shock insulation ditch enclosure wall of deep foundation isolation structure according to claim 1, is characterized in that: described soldier pile (1) adopts single stake or double-row pile.
3. the shock insulation ditch enclosure wall of deep foundation isolation structure according to claim 1, is characterized in that: the height that the height of described built-in fitting anchor slab (18) is not less than retaining wall adds basic plank thickness.
4. the shock insulation ditch enclosure wall of deep foundation isolation structure according to claim 1, is characterized in that: every limit, horizontal section of described built-in fitting anchor slab (18) is than the wide 20 ~ 40mm of going out of strut rail cob wall (5).
5. the shock insulation ditch enclosure wall of deep foundation isolation structure according to claim 1, is characterized in that: described steel waist rail (3) is outer is surrounded by concrete breast beam, and concrete breast beam and outer retaining wall (4) are built and be integrated.
6. the shock insulation ditch enclosure wall of deep foundation isolation structure according to claim 1, is characterized in that: described strut rail cob wall (5) bottom has cross wall inspection manhole (10).
7. the shock insulation ditch enclosure wall of deep foundation isolation structure according to claim 1, is characterized in that: described top Guan Liang (17) adopts cast-in-situ concrete beam or cast-in-situ reinforced concrete slab.
8. a constructive method for the shock insulation ditch enclosure wall of deep foundation isolation structure as described in claim 1～7 any one, is characterized in that construction sequence is as follows:
Step 1, the reinforcing cage of colligation soldier pile (1), is fixed on built-in fitting anchor slab (18) inner face on the reinforcing cage of soldier pile (1), and built-in fitting reinforcing bar (19) one end is fixed on built-in fitting anchor slab (18) inner face, and the other end stretches into soldier pile (1) pile body inside,
Step 2, carries out soldier pile (1) construction, guarantees built-in fitting accurate positioning;
Step 3, carries out excavation of foundation pit and precipitation operation, the anchor cable of constructing in digging process, and the downward-sloping insertion site soil layers in anchor cable (2) one end (14), the other end is anchored at the anchored end (3.1) on steel waist rail (3) through adjacent two soldier piles (1) space; Stretch-draw anchor, and the condition of reserved anchor cable two times tensioning;
Step 4, after excavation of foundation pit completes, the vertical weldable steel floor (7) side by side in built-in fitting anchor slab (18) outside, steel floor has horizontal U-shaped mouth (7.1) towards the interval, one side of major structure of construction (12);
Step 5, by smooth the sprayed mortar surfacing on site soil layers (14) sidewall between soldier pile (1), sticks on waterproof roll (15) on the surface of sprayed mortar;
Step 6, the basic raft plate (8) of constructing, the raft slab muscle welding by steel floor (7) bottom with corresponding basic raft plate (8), completes basic raft plate (8) construction;
Step 7, construction retaining wall, connect into lattice type retaining wall by outer retaining wall (4), strut rail cob wall (5) and interior retaining wall (6), the horizontal reinforcement (5.1) of strut rail cob wall (5) welds with the steel floor (7) on corresponding soldier pile, the outer row of horizontal reinforcing bar (4.1) of outer retaining wall (4) is arranged in the horizontal U-shaped mouth (7.1) of steel floor (7), between waterproof roll (15) and outer retaining wall (4), is provided with polyphenyl topping (16);
Step 8, the anchored end (3.1) to anchor cable (2) is carried out two times tensioning, and anchor cable pulling force reaches Design of Retaining Structure requirement, uses concrete enclosing after stretch-draw completes;
Step 9, at soldier pile (1) and construction top, retaining wall top Guan Liang (17).
9. the shock insulation ditch enclosure wall of deep foundation isolation structure according to claim 8, is characterized in that: described step 7, construction retaining wall starts at the upper construction of basic raft plate (8) Seismic Isolation of Isolation Layer (11) and major structure of construction (12) simultaneously.
10. the shock insulation ditch enclosure wall of deep foundation isolation structure according to claim 8, is characterized in that: after described step 9, continue construction building agent structure (12), stop precipitation.
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Cited By (7)
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| CN105804090A (en) * | 2016-04-15 | 2016-07-27 | 肖锐 | Indoor piling wall support structure and construction method therefor |
| CN105908759A (en) * | 2016-06-12 | 2016-08-31 | 中国十七冶集团有限公司 | Device for reinforcing concrete sprayed in deep foundation pit and construction method |
| CN107975043A (en) * | 2018-01-05 | 2018-05-01 | 沙焕焕 | Foundation pit supporting construction and underground structure, basic integrated structure |
| CN108487302A (en) * | 2018-04-02 | 2018-09-04 | 山东建筑大学 | The compound earth-retaining piling wall and construction method of a kind of support pile, retaining wall and pile foundation |
| CN109235490A (en) * | 2018-11-16 | 2019-01-18 | 青岛业高建设工程有限公司李沧分公司 | Retaining wall and its construction method |
| CN115419107A (en) * | 2022-09-17 | 2022-12-02 | 上海建工一建集团有限公司 | Soil piling structure for artificial mountain-shaped building in deformation sensitive area and construction method thereof |
| CN109235490B (en) * | 2018-11-16 | 2024-05-03 | 青岛业高建设工程有限公司 | Retaining wall and construction method thereof |
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| CN109235490B (en) * | 2018-11-16 | 2024-05-03 | 青岛业高建设工程有限公司 | Retaining wall and construction method thereof |
| CN115419107A (en) * | 2022-09-17 | 2022-12-02 | 上海建工一建集团有限公司 | Soil piling structure for artificial mountain-shaped building in deformation sensitive area and construction method thereof |
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Address after: 100120 Beijing Xicheng District Dewai Street No. 12 Patentee after: CHINA AVIATION PLANNING AND DESIGN INSTITUTE (GROUP) CO., LTD. Address before: 100120 Beijing Xicheng District Dewai Street No. 12 Patentee before: China Aviation Planning and Construction Development Co., Ltd. |