CN112267557B - Construction method of underground baffle plate supporting structure - Google Patents
Construction method of underground baffle plate supporting structure Download PDFInfo
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- CN112267557B CN112267557B CN202011124292.1A CN202011124292A CN112267557B CN 112267557 B CN112267557 B CN 112267557B CN 202011124292 A CN202011124292 A CN 202011124292A CN 112267557 B CN112267557 B CN 112267557B
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- 238000010276 construction Methods 0.000 title claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 38
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- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 47
- 239000010959 steel Substances 0.000 claims description 47
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 239000004567 concrete Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000004575 stone Substances 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000009415 formwork Methods 0.000 description 3
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- 235000003181 Panax pseudoginseng Nutrition 0.000 description 2
- 244000131316 Panax pseudoginseng Species 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/0007—Base structures; Cellars
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/20—Posts therefor
- E04H17/22—Anchoring means therefor, e.g. specially-shaped parts entering the ground; Struts or the like
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention provides a construction method of an underground baffle plate supporting structure with small excavation amount of an undisturbed soil body below a monitoring wall, which comprises the following steps of A, excavating two base grooves which are parallel along the length direction and are arranged at intervals, and vertically arranging the installation side walls of the base grooves; b, manufacturing a baffle; c, installing the baffle in the base groove; d, repeating the step C, and sequentially connecting a plurality of baffles in each base groove end to end along the length direction of the installation side wall until the installation side wall is completely covered; e, backfilling a backfill space; and F, mounting connecting plates at the upper end of the baffle in one foundation trench, the upper end of the baffle in the other foundation trench and the upper end of the undisturbed soil between the two foundation trenches. Through reducing the excavation volume of prison wall below original state soil, reduce construction cycle, avoid the not enough problem of the closely knit degree of tamped soil that produces because of the backfill volume is great. And the load of the main structure of the monitoring wall can be effectively prevented from being transmitted to the baffle plate in a large quantity, and the possibility of settlement of the main structure of the monitoring wall is reduced.
Description
Technical Field
The invention relates to the technical field of prison enclosure engineering construction, in particular to a construction method of an underground baffle plate supporting structure.
Background
A detention house or prison generally includes two layers of inner and outer enclosing walls arranged at intervals, the inner layer of enclosing walls is called prison enclosing walls, and is hereinafter referred to as prison enclosing walls: and (4) monitoring the wall, wherein a criminal suspect or a prisoner moves in the space enclosed by the monitoring wall. And a building for the office of the judicial staff is built between the monitoring wall and the outer wall.
In order to prevent criminal suspects who are subjected to criminal enforcement measures or prisoners who are serving criminals, prisons are crossed by communicating the inside and the outside of a prison wall in a ground hole punching mode. A reinforced concrete baffle plate with a certain height is usually arranged below the monitoring wall, and is referred to as follows: and a baffle plate. The reinforced concrete has the advantages of high strength and good shock resistance. The existing underground concrete structure is formed mainly in a cast-in-place mode.
The baffle is a single thin component with the height not less than 2m and the thickness not less than 15 cm. If the construction is carried out in a cast-in-place mode, the width of the foundation trench after excavation molding is wide, so that the constructors can smoothly install the template in the foundation trench. Therefore, the method excavates more undisturbed soil, the backfill amount at the later stage is larger, and the strength of the backfilled soil is far lower than that of the undisturbed soil.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method of an underground baffle plate supporting structure with small excavation amount of an undisturbed soil body below a monitoring wall.
The technical scheme adopted by the invention for solving the technical problems is as follows: the construction method of the underground baffle plate supporting structure comprises the following steps:
a, digging base grooves with upward openings in a soil body, wherein the two base grooves are parallel along the length direction and are arranged at intervals; the side walls adjacent to the two base grooves are vertically arranged and form installation side walls, and the other side opposite to the installation side walls is a backfill side wall;
b, installing a first template, wherein the first template encloses a first pouring space; installing a first reinforcing mesh and a lifting lug in the first pouring space; pouring concrete into the first pouring space to achieve the form removal strength and form a baffle;
the hooking part of the lifting lug and part of the steel bars of the first steel bar mesh extend out of the same end part of the baffle; the first reinforcing mesh extends to the reinforcing steel bars outside the end part of the baffle plate to form reserved reinforcing steel bars;
the thickness x of the baffle plate is smaller than the width y of the base groove, the length of the baffle plate is smaller than the length of the base groove, and the height of the baffle plate is equal to the depth of the base groove;
c, hoisting the baffle plate into the foundation trench through the matching of the hoisting equipment and the hook part; through the matching adjustment of a steel pipe obliquely inserted into the base groove, one side surface of the baffle is tightly attached to the installation side wall, and both the reserved steel bar and the hook part are upward; the mounting and fixing device tightly supports the baffle plate against the mounting side wall;
d, repeating the step C, and sequentially connecting a plurality of baffles in each base groove end to end along the length direction of the installation side wall until the installation side wall is completely covered;
e, backfilling a backfilling space between the baffle and the backfilling side wall, and removing the fixing device;
and F, arranging a connecting plate on the undisturbed soil between the two foundation grooves, wherein one end of the connecting plate is connected with the baffle end in one foundation groove, and the other end of the connecting plate is connected with the upper end of the baffle in the other foundation groove.
Further, the step D specifically includes the steps of:
d1, mounting the two first limiting plates at one end of the first screw at intervals, and clamping the top of the baffle in one of the base grooves between the two first limiting plates;
d2, mounting the first mounting section of the first screw in the sleeve, wherein the first mounting section is in threaded connection with the first connecting section of the sleeve;
d3, mounting the two second limiting plates at one end of the second screw at intervals, and clamping the top of the corresponding baffle in the other base groove between the two second limiting plates;
d4, mounting the second mounting section of the second screw in the sleeve, and connecting the second mounting section with the second connecting section of the sleeve in a threaded manner.
Further, the step F specifically includes the steps of:
f1, mounting a second template at the upper end of one side of the baffle plate far away from the mounting side wall, and forming a second pouring space between the second templates on the two oppositely arranged baffle plates;
f2, installing a second reinforcing mesh in the second pouring space, and fixedly connecting the reserved reinforcing steel bars with the second reinforcing mesh;
f3, pouring concrete into the second pouring space to achieve the form removal strength, and forming the connecting plate.
Further, before the step E, the method further includes a step G: and backfilling the sand-connecting stone in the gap between the baffle and the mounting side wall.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a construction method of an underground baffle plate supporting structure with small excavation amount of an undisturbed soil body below a monitoring wall. Through reducing the excavation volume of prison wall below original state soil, reduce construction cycle, avoid the not enough problem of the closely knit degree of tamped soil that produces because of the backfill volume is great. And the load of the main structure of the monitoring wall can be effectively prevented from being transmitted to the baffle plate in a large quantity, and the possibility of settlement of the main structure of the monitoring wall is reduced.
Drawings
FIG. 1 is a diagram of the position of the baffle and the monitoring wall of the present invention;
FIG. 2 is a schematic view of the structure of the baffle plate of the present invention cooperating with a steel pipe;
FIG. 3 is a schematic view of the construction of the baffle of the present invention secured in a base tank;
FIG. 4 is a schematic illustration of the position of a second template of the present invention;
FIG. 5 is a diagram showing the positional relationship between a plurality of baffle plates in the same basic groove of the present invention;
the reference numbers in the figures are: 1-a base tank; 101-mounting a side wall; 102-backfilling sidewalls; 2-a baffle plate; 3-reserving reinforcing steel bars; 4-a hook portion; 5-connecting plates; 6-a first limiting plate; 7-a first screw; 8-a second limiting plate; 9-a second screw; 10-a sleeve; 11-a second template; 12-a steel pipe; 13-a foundation cap; 14-a wall base; 15-ring beam; 16-monitoring the wall; 17-backfill space.
Detailed Description
The present invention will be further described with reference to the following examples.
The construction method of the underground supporting structure comprises the following steps:
step A, digging base grooves 1 with upward openings in a soil body, wherein the two base grooves 1 are parallel along the length direction and are arranged at intervals; the adjacent side walls of the two base grooves 1 are vertically arranged and form a mounting side wall 101, and the other side opposite to the mounting side wall 101 is a backfill side wall 102.
And (3) establishing an axis control network according to the original coordinate points given by the survey design, and carrying out excavation width measurement lofting on the foundation trench 1 before excavation. In order to ensure that the installation side wall 101 is vertical, in the excavation process, the installation side wall 101 is retested every 50cm of downward excavation until the design elevation is reached. Meanwhile, the laser level gauge and the like can be used for assisting in measurement so as to improve the vertical accuracy of the installation side wall 101. The backfill sidewall 102 opposite the installation sidewall 101 does not have the requirement for vertical accuracy. The opening of the molded base groove 1 is upward, and the two base grooves 1 are parallel and arranged at intervals along the length direction.
B, mounting a first template, wherein the first template encloses a first pouring space; installing a first reinforcing mesh and a lifting lug in the first pouring space; pouring concrete into the first pouring space to achieve the form removal strength, and forming a baffle 2; the hooking part 4 of the lifting lug and part of the steel bars of the first steel bar mesh extend out of the same end part of the baffle 2; the steel bars of the first steel bar mesh extending out of the end part of the baffle 2 form reserved steel bars 3; the thickness x of the baffle 2 is smaller than the width y of the base groove 1, the length of the baffle 2 is smaller than the length of the base groove 1, and the height of the baffle 2 is equal to the depth of the base groove 1.
The first template of installation, first reinforcing bar net and lug are installed in the first space of pouring that encloses at first template, and the lug can be installed a plurality ofly according to actual need. And pouring concrete into the first pouring space, and removing the first template to form the baffle 2 after the template removing strength is reached. The hooking portion 4 of the lifting eye and part of the reinforcement of the first mesh reinforcement extend beyond the same end of the baffle 2. The reinforcement of the first mesh reinforcement extending beyond the end of the baffle-panel 2 forms the pre-reinforcement 3. The top elevation position of the baffle 2 adopts a closing-up net for closing up, and the closing-up net can be an iron wire net to prevent overflow during concrete pouring. Furthermore, in order to ensure the accurate position of the reserved steel bar 3, a vertical bar can be bound on the reserved steel bar 3. The length of the reserved steel bar 3 is 35 d. The thickness x of the formed baffle 2 is smaller than the width y of the base groove 1, the length of the formed baffle 2 is smaller than the length of the base groove 1, and the height of the baffle 2 is equal to the depth of the base groove 1, so that the baffle 2 can be installed in the base groove 1.
C, hoisting the baffle 2 into the base groove 1 by matching the hoisting equipment with the hook part 4; the steel pipe 12 inserted into the base groove 1 in an inclined way is matched and adjusted, one side face of the baffle 2 is tightly attached to the installation side wall 101, and the reserved steel bars 3 and the hook parts 4 are upward; and installing a fixing device to tightly press the baffle 2 against the installation side wall 101.
After the closed-loop lifting hook of the lifting device is hooked with the hooking part 4, the baffle 2 is lifted into the base groove 1. When the bottom end of the baffle plate 2 is spaced apart from the bottom of the base tank 1 by about 50cm, the position of the bottom of the baffle plate 2 is adjusted using the steel pipe 12. Specifically, the constructor stands on the ground at the top of the backfill sidewall 102 and inserts the steel pipe 12 obliquely into the foundation trench 1, wherein the bottom end of the steel pipe 12 contacts the bottom of the foundation trench 1 and is close to the installation sidewall 101. The baffle 2 is located in the V-shaped channel formed by the steel pipe 12 and the mounting side wall 101. The bottom end of the baffle 2 is contacted with the outer wall of the steel pipe 12, the contact position of the bottom end of the steel pipe 12 and the bottom of the base groove 1 is used as a rotation point O, and the bottom end of the baffle 2 is tightly attached to the installation side wall 101 by adjusting the inclination degree of the steel pipe 12. With the baffle 2 slowly lowered, the bottom end of the steel pipe 12 slowly moves in a direction away from the installation side wall 101 until the bottom end of the baffle 2 descends to the bottom of the base tank 1, and the steel pipe 12 is taken out. The baffle 2 is then held tightly against the mounting side wall 101 by the fixing means.
And D, repeating the step C, and sequentially connecting the baffles 2 in each base groove 1 end to end along the length direction of the installation side wall 101 until the installation side wall 101 is completely covered.
And C, installing each baffle 2. That is, each baffle 2 is hoisted to the foundation trench 1 under the matching of the hoisting equipment and the hook part 4, and is adjusted by the matching of the steel pipe 12 obliquely inserted into the foundation trench 1, one side surface of the baffle 2 is tightly attached to the installation side wall 101, the reserved steel bar 3 and the hook part 4 are upward, and the baffle 2 is tightly attached to the installation side wall 101 through the fixing device. The baffles 2 in each foundation trench 1 are sequentially connected end to end along the length direction of the installation side wall 101 until the installation side wall 101 is completely covered.
Step E, backfilling the backfilling space 17 between the baffle plate 2 and the backfilling sidewall 102, and removing the fixing device.
And backfilling the backfilling space 17 between the baffle plate 2 and the backfilling side wall 102 by using undisturbed soil, pseudo-ginseng gray soil or graded sand stone, and then removing the fixing device. Wherein the undisturbed soil needs to remove organic substances such as turf, flitch, bamboo materials and the like, and the volume ratio of quicklime to clay in the pseudo-ginseng grey soil is 3: 7. During backfilling, layered backfilling is carried out, and the backfilling thickness of each layer is greater than or equal to 30 cm. And when one layer is backfilled, the flat plate vibrating rammer is tamped, so that the compaction construction quality of the backfilled earthwork is ensured. The width of the backfill space 17 is preferably 40 cm.
And F, arranging a connecting plate 5 on the undisturbed soil between the two base grooves 1, wherein one end of the connecting plate 5 is connected with the upper end of the baffle plate 2 in one base groove 1, and the other end of the connecting plate 5 is connected with the upper end of the baffle plate 2 in the other base groove 1.
The baffle 2 in one of the foundation trenches 1, the baffle 2 in the other foundation trench 1 and the undisturbed soil between the two foundation trenches 1 all support the connecting plate 5. The connecting plate 5 and the baffles 2 respectively positioned in the two foundation troughs 1 form a U-shaped underground baffle supporting structure with a downward opening together, and the foundation bearing platform 13, the wall foundation 14, the ring beam 15 and the monitoring wall 16 are sequentially arranged on the connecting plate 5 from bottom to top. The baffles 2 are located on both sides of the wall 16 and are arranged along the length of the wall 16. During construction, the damage to the soil body structure of the undisturbed soil below the monitoring wall 16 is small, and the problem of insufficient compaction degree of the tamped soil caused by large backfill amount is avoided. Connecting plate 5 can the effect of dispersion force, and the original state soil of connecting plate 5 below is supported effectually, prevents to watch on wall major structure load from transmitting in a large number to baffle 2, reduces the possibility that the watch on wall main part subsides.
Wherein the order of step A, B may be interchanged. Firstly, excavating a base groove 1, and then manufacturing a baffle plate component; or the baffle plate component can be manufactured firstly and then the foundation trench 1 is dug.
The fixing device is used for tightly pressing the baffle plate 2 against the installation side wall 101. Step D has various embodiments: the first embodiment: a supporting rod is arranged between the baffle 2 and the backfill side wall 102, one end of the supporting rod is tightly propped against the backfill side wall 102, and the other end of the supporting rod is tightly propped against the side face of the baffle 2.
In a second embodiment, step D specifically includes the steps of:
d1, the two first limit plates 6 are arranged at one end of the first screw 7 at intervals, and the top of the baffle 2 in one of the base grooves 1 is clamped between the two first limit plates 6;
d2, installing the first installation section of the first screw 7 in the sleeve 10, wherein the first installation section is in threaded connection with the first connection section of the sleeve 10;
d3, mounting the two second limit plates 8 at one end of the second screw 9 at intervals, and clamping the tops of the corresponding baffle plates 2 in the other base groove 1 between the two second limit plates 8;
d4, mounting the second mounting section of the second screw 9 in the sleeve 10, and connecting the second mounting section with the second connecting section of the sleeve 10 in a threaded manner.
The first mounting section of the first screw 7 is far away from the first limit plate 6, and the second mounting section of the second screw 9 is far away from the second limit plate 8. The sleeve 10 comprises a first connecting section and a second connecting section which are arranged in sequence, wherein a thread in the first connecting section and a thread in the second connecting section are arranged in a reverse direction, a first mounting section is in threaded connection with the first connecting section, and a second mounting section is in threaded connection with the second connecting section. After the fixing device is installed, the first limiting plate 6 and the second limiting plate 8 are respectively located on two sides of the sleeve 10. The adjustment of the distance between the first limiting plate 6 and the second limiting plate 8 is realized by adjusting the elongation of the first screw 7 or the second screw 9 in the sleeve 10. Namely, two opposite baffle plates 2 are fixed in a pulling mode, and the baffle plates 2 are erected closely to the installation side wall 101. In specific implementation, the sequences of steps d1, d2, d3 and d4 can be interchanged.
Step F has various embodiments: in the first embodiment, the connecting plate 5 is a prefabricated plate, the two ends of the same side face are respectively reserved with connecting steel bars, the prefabricated connecting plate 5 is installed on original soil between the two foundation grooves 1, the connecting steel bar at one end is connected with the reserved steel bar 3 of the baffle plate 2 in one foundation groove 1, and the connecting steel bar at the other end is connected with the reserved steel bar 3 of the baffle plate 2 in the other foundation groove 1. Preferably, before the connection plate 5 is installed, undisturbed soil between the two foundation ditches 1 is tamped down by a plate vibration tamp.
In a second embodiment, step F specifically includes the steps of:
f1, mounting second formworks 11 at the upper ends of the side, far away from the mounting side wall 101, of the baffles 2, and forming a second pouring space between the second formworks 11 on the two oppositely arranged baffles 2;
f2, installing a second reinforcing mesh in the second pouring space, and fixedly connecting the reserved steel bars 3 with the second reinforcing mesh;
f3, pouring concrete into the second pouring space to achieve the form removal strength, and forming the connecting plate 5.
The reserved steel bars 3 are fixedly connected with the second steel bar mesh in a welding or binding mode, concrete is poured into the second pouring space, the formed connecting plate 5 is tightly connected with the baffle 2, the structure is stable, and the stress strength is high. Preferably, before the concrete is poured into the second pouring space, the undisturbed soil between the two foundation ditches 1 is tamped down by a flat plate vibrating ram. Wherein, the sequence of the steps f1 and f2 can be interchanged, that is, the second template 11 can be installed first, and then the second reinforcing mesh can be installed; alternatively, the second mesh reinforcement may be installed first, followed by the second formwork 11.
In order to enhance the structural stability and the stress strength between the baffle plate 2 and the formed connecting plate 5, it is preferable that the distance from the distal end of the hooking part 4 to the top of the baffle plate 2 is L1, the distance from the distal end of the reserve reinforcement bar 3 to the top of the baffle plate 2 is L2, and L1 is smaller than L2. And the baffle 2 arranged in the foundation trench 1 is provided with a hook part 4 and a reserved steel bar 3 which are upward, and the reserved steel bar 3 is bent and then fixedly connected with the stress bar of the second steel bar mesh. After the stress bar is fixedly connected with the reserved steel bar 3, the baffle 2 and the connecting plate 5 are connected more stably, and the baffle can bear larger load.
The installation side wall 101 is usually mixed with larger impurities such as small stones and the like, and a gap is formed between the baffle plate 2 and the installation side wall 101, and preferably, before the step E, the method further comprises a step G: sand is backfilled in the gap between the baffle 2 and the mounting side wall 101.
The above is a specific embodiment of the present invention, and it can be seen from the implementation process that the present invention provides a construction method for an underground baffle plate support structure with a small excavation amount of an undisturbed soil body below a monitoring wall. Through reducing the excavation volume of prison wall below original state soil, reduce construction cycle, avoid the not enough problem of the closely knit degree of tamped soil that produces because of the backfill volume is great. And the load of the main structure of the monitoring wall can be effectively prevented from being transmitted to the baffle plate in a large quantity, and the possibility of settlement of the main structure of the monitoring wall is reduced.
Claims (4)
1. The construction method of the underground baffle plate supporting structure is characterized by comprising the following steps: the method comprises the following steps:
a, digging base grooves (1) with upward openings in a soil body, wherein the two base grooves (1) are parallel along the length direction and are arranged at intervals; the adjacent side walls of the two base grooves (1) are vertically arranged to form an installation side wall (101), and the other side opposite to the installation side wall (101) is a backfill side wall (102);
b, installing a first template, wherein the first template encloses a first pouring space; installing a first reinforcing mesh and a lifting lug in the first pouring space; pouring concrete into the first pouring space to achieve the form removal strength and form a baffle (2);
the hooking part (4) of the lifting lug and part of the steel bars of the first steel bar mesh extend out of the same end part of the baffle (2); the steel bars of the first steel bar mesh extending out of the end part of the baffle (2) form reserved steel bars (3);
the thickness x of the baffle (2) is smaller than the width y of the base groove (1), the length of the baffle (2) is smaller than the length of the base groove (1), and the height of the baffle (2) is equal to the depth of the base groove (1);
c, hoisting the baffle (2) into the foundation trench (1) through the matching of the hoisting equipment and the hook part (4); the steel pipe (12) inserted into the base groove (1) in an inclined way is matched and adjusted, one side face of the baffle (2) is tightly attached to the installation side wall (101), and the reserved steel bar (3) and the hook part (4) are upward; the mounting and fixing device is used for tightly abutting the baffle (2) against the mounting side wall (101);
d, repeating the step C, wherein the baffles (2) in each base groove (1) are sequentially connected end to end along the length direction of the installation side wall (101) until the installation side wall (101) is completely covered;
e, backfilling a backfilling space (17) between the backfilling baffle plate (2) and the backfilling side wall (102), and removing the fixing device;
f, arranging a connecting plate (5) on the undisturbed soil between the two foundation troughs (1), wherein one end of the connecting plate (5) is connected with the upper end of the baffle (2) in one foundation trough (1), and the other end of the connecting plate is connected with the upper end of the baffle (2) in the other foundation trough (1);
the baffle (2) in one base groove (1), the baffle (2) in the other base groove (1) and the undisturbed soil between the two base grooves (1) all support the connecting plate (5);
the connecting plate (5) and the baffles (2) respectively positioned in the two foundation grooves (1) jointly form a U-shaped underground baffle supporting structure with a downward opening, and the foundation bearing platform (13), the wall foundation (14), the ring beam (15) and the monitoring wall (16) are sequentially arranged on the connecting plate (5) from bottom to top.
2. The method of constructing an underground diaphragm support structure of claim 1, wherein: the step D specifically comprises the following steps:
d1, the two first limit plates (6) are arranged at one end of the first screw (7) at intervals, and the top of the baffle (2) in one of the base grooves (1) is clamped between the two first limit plates (6);
d2, mounting the first mounting section of the first screw (7) in the sleeve (10), wherein the first mounting section is in threaded connection with the first connecting section of the sleeve (10);
d3, the two second limit plates (8) are arranged at one end of the second screw (9) at intervals, and the tops of the corresponding baffle plates (2) in the other base groove (1) are clamped between the two second limit plates (8);
d4, installing the second installation section of the second screw (9) in the sleeve (10), and connecting the second installation section with the second connecting section of the sleeve (10) in a threaded manner.
3. The method of constructing an underground diaphragm support structure of claim 1, wherein: the step F specifically comprises the following steps:
f1, mounting a second template (11) at the upper end of one side of the baffle (2) far away from the mounting side wall (101), and forming a second pouring space between the second templates (11) on the two oppositely arranged baffles (2);
f2, installing a second reinforcing mesh in the second pouring space, and fixedly connecting the reserved steel bars (3) with the second reinforcing mesh;
f3, pouring concrete into the second pouring space to achieve the form removal strength, and forming the connecting plate (5).
4. The method of constructing an underground diaphragm support structure of claim 1, wherein: before the step E, the method further comprises the step G: and backfilling the sand-connecting stone in the gap between the baffle (2) and the installation side wall (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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