阅读说明：本技术 一种玄武岩地层水下混凝土灌注系统及施工方法 (Basalt stratum underwater concrete pouring system and construction method ) 是由 林志斌 李君祥 张冬云 刘延涛 罗鸿儒 赵国庆 孔买群 王桂芳 杨晓东 杨萍丽 于 2020-05-22 设计创作，主要内容包括：本发明公开了一种玄武岩地层水下混凝土灌注系统,涉及水下混凝土灌注施工技术领域。所述灌注系统包括混凝土料斗、混凝土导管、泥浆管、泥浆泵、沉淀池和泥浆池,泥浆池内设置有泥浆泵,泥浆泵出口与泥浆管一端连通,另一端置于灌注孔底部,混凝土导管一端与混凝土料斗出料口连通,另一端设置于灌注孔内,灌注孔顶部设置有泥浆溢出口,泥浆溢出口依次与沉淀池和泥浆池连通。在混凝土灌注过程中采用孔内正循环泥浆方法,从泥浆池内泥浆泵泵出泥浆,经泥浆管输送至灌注孔内,使灌注孔内泥浆从下往上运动,如此循环使得悬浮颗粒难以沉积,成桩质量好,无夹渣断层现象,同时提高孔内泥浆的性能,提高钢筋笼与混凝土之间的握裹力,保证施工进度和质量。(The invention discloses an underwater concrete pouring system for a basalt stratum, and relates to the technical field of underwater concrete pouring construction. The pouring system comprises a concrete hopper, a concrete guide pipe, a slurry pump, a sedimentation tank and a slurry tank, wherein the slurry pump is arranged in the slurry tank, the outlet of the slurry pump is communicated with one end of the slurry pipe, the other end of the slurry pump is arranged at the bottom of the pouring hole, one end of the concrete guide pipe is communicated with the discharge hole of the concrete hopper, the other end of the concrete guide pipe is arranged in the pouring hole, a slurry overflow outlet is arranged at the top of the pouring hole, and the slurry overflow outlet is sequentially communicated with the sedimentation tank and the slurry. In the concrete pouring process, an in-hole positive circulation slurry method is adopted, slurry is pumped out from a slurry pump in a slurry tank and is conveyed into a pouring hole through a slurry pipe, so that the slurry in the pouring hole moves from bottom to top, suspended particles are difficult to deposit due to circulation, the pile forming quality is good, the slag inclusion fault phenomenon is avoided, the performance of the slurry in the hole is improved, the bond strength between a steel reinforcement cage and concrete is improved, and the construction progress and quality are ensured.)

1. The basalt stratum underwater concrete pouring system is characterized in that: including concrete hopper (1), concrete pipe (2), mud pipe (3), slush pump (4), sedimentation tank (5) and mud pit (6), be provided with slush pump (4) in mud pit (6), export and mud pipe (3) one end intercommunication of slush pump (4), filling hole (7) bottom is arranged in to mud pipe (3) other end, concrete hopper (1) sets up in filling hole (7) top, concrete pipe (2) one end and concrete hopper (1) discharge gate intercommunication, concrete pipe (2) other end sets up in filling hole (7), filling hole (7) top is provided with the mud overflow outlet, the mud overflow outlet communicates with sedimentation tank (5) and mud pit (6) in proper order.

2. The basalt formation underwater concrete placement system of claim 1, wherein: the one end bottom that mud pipe (3) are located pouring hole (7) is connected with head (8), head (8) are by connecting pipe (801), fixed plate (802), connecting rod (803) and bottom plate (804) constitute, fixed plate (802) and bottom plate (804) parallel arrangement, connecting rod (803) one end is connected with fixed plate (802), the connecting rod (803) other end is connected with bottom plate (804), connecting rod (803) are along fixed plate (802) radial evenly distributed, fixed plate (802) top is fixed with connecting pipe (801), connecting pipe (801) and mud pipe (3) intercommunication.

3. The basalt formation underwater concrete placement system of claim 1, wherein: and a counterweight (9) is arranged on the side wall of one end of the mud pipe (3) positioned in the filling hole (7).

4. The basalt formation underwater concrete placement system of claim 1, wherein: the mud pipe (3) is suspended in the pouring hole (7) and is 6-10m away from the bottom of the concrete guide pipe (2).

5. The basalt formation underwater concrete placement system of claim 4, wherein: the part of the mud pipe (3) in the pouring hole (7) is arranged in parallel with the concrete guide pipe (2).

6. A construction method of a basalt stratum underwater concrete pouring system is characterized by comprising the following steps:

s1: the concrete guide pipe (2) is butted with a discharge hole of the concrete hopper (1) and suspended in the pouring hole (7), and the first tank concrete is poured;

s2, erecting the slurry pump (4) in a slurry pool (6), butting one end of the slurry pipe (3) with an outlet of the slurry pump (4), and suspending the other end in a pouring hole (7); the slurry pump (4) is started, the slurry pipe (3) sends the pumped slurry (10) into the pouring hole (7), the slurry (10) rises from the bottom of the pouring hole (7) and flows into the sedimentation tank (5) from a slurry overflow outlet at the top, and flows into the slurry tank (6) after the liquid level of the sedimentation tank (5) overflows to enter circulation, and meanwhile, concrete is poured into the concrete hopper (1);

s4: and (3) synchronously lifting the mud pipe (3) and the concrete guide pipe (2) along with the rising of the poured concrete surface, and keeping the depth of the concrete guide pipe (2) embedded in the concrete surface to be 2-6m until the concrete pouring is finished.

7. The construction method of the basalt formation underwater concrete pouring system according to claim 6, wherein: before the concrete is poured in the step S1, after secondary hole cleaning and acceptance inspection are qualified, the wastes in the sedimentation tank (5) and the mud tank (6) are cleaned, fresh bentonite mud is prepared again, and each performance index of the mud (10) meets the standard requirement.

8. The construction method of the basalt formation underwater concrete pouring system according to claim 6, wherein: and in the step S2, the bottom of one end, located in the filling hole (7), of the mud pipe (3) is connected with an end enclosure (8) and a balancing weight (9).

9. The construction method of the basalt formation underwater concrete pouring system according to claim 8, wherein: head (8) comprise connecting pipe (801), fixed plate (802), connecting rod (803) and bottom plate (804), fixed plate (802) and bottom plate (804) parallel arrangement, connecting rod (803) one end is connected with fixed plate (802), the connecting rod (803) other end is connected with bottom plate (804), connecting rod (803) are along fixed plate (802) radial evenly distributed, fixed plate (802) top is fixed with connecting pipe (801), connecting pipe (801) and mud pipe (3) intercommunication.

Technical Field

The invention relates to the technical field of underwater concrete pouring construction, in particular to an underwater concrete pouring system for a basalt stratum and a construction method.

Background

The main flow of the traditional underwater concrete pouring process is that concrete is fed into the bottom of a hole through a concrete conduit, and slurry in the hole overflows from the top of the hole and flows into a slurry pool under the influence of the impact force of the concrete until the concrete pouring is finished. The method is generally used in underwater concrete pouring construction of hydraulic engineering, railway engineering, municipal engineering, highway engineering and the like, and comprises pile foundation engineering, underground continuous wall engineering, impervious wall engineering and the like. However, when the concrete pile is used in a basalt stratum, due to the fact that rock density is high, the sinking speed of suspended fine particles in slurry is high, the concrete surface is hardened, even the concrete surface is not raised, the underwater concrete pouring is interrupted, or the situations of slag inclusion, fault and the like occur in pile foundation detection after pile forming, the quality qualification rate of the pile foundation is reduced, the engineering construction cost is greatly increased, and great risks are brought to engineering quality and construction progress.

Disclosure of Invention

The invention aims to provide an underwater concrete pouring system for a basalt stratum and a construction method, and solves the problems that the existing underwater concrete pouring process applied to the basalt stratum cannot ensure the construction quality, and pouring interruption or slag inclusion faults after pile forming can occur.

In order to solve the technical problems, the invention adopts the following technical scheme: the basalt stratum underwater concrete pouring system is characterized in that: including the concrete hopper, the concrete pipe, the mud pipe, the slush pump, sedimentation tank and mud pit, be provided with the slush pump in the mud pit, mud pump export and mud pipe one end intercommunication, the filling hole bottom is arranged in to the mud pipe other end, the concrete hopper sets up in the filling hole top, concrete pipe one end and concrete hopper discharge gate intercommunication, the concrete pipe other end sets up in the filling hole, the filling hole top is provided with the mud overflow outlet, the mud overflow outlet in proper order with sedimentation tank and mud pit intercommunication.

The technical scheme is that the bottom of one end of the slurry pipe, which is positioned in the filling hole, is connected with a seal head, the seal head is composed of a connecting pipe, a fixed plate, a connecting rod and a bottom plate, the fixed plate is arranged in parallel with the bottom plate, one end of the connecting rod is connected with the fixed plate, the other end of the connecting rod is connected with the bottom plate, the connecting rod is uniformly distributed along the radial direction of the fixed plate, the top of the fixed plate is fixedly provided with the connecting.

The further technical proposal is that a balancing weight is arranged on the side wall of one end of the mud pipe in the filling hole.

The further technical proposal is that the mud pipe is suspended in the pouring hole and has a distance of 6-10m with the bottom of the concrete conduit.

The further technical proposal is that the part of the mud pipe in the pouring hole is arranged in parallel with the concrete conduit.

The invention also relates to a construction method of the basalt stratum underwater concrete pouring system, which is characterized by comprising the following steps:

s1: butting the concrete guide pipe with the discharge port of the concrete hopper, suspending the concrete guide pipe in a pouring hole, and pouring first-tank concrete;

s2, erecting the mud pump in a mud pool, butting one end of a mud pipe with an outlet of the mud pump, and suspending the other end of the mud pipe in a pouring hole; starting a slurry pump, sending pumped slurry into a pouring hole by a slurry pipe, enabling the slurry to rise from the bottom of the pouring hole and flow into a sedimentation tank from a slurry overflow outlet at the top, enabling the slurry to flow into a slurry tank after the liquid level of the sedimentation tank overflows and enter a circulation mode, and pouring concrete into a concrete hopper;

s4: and (3) synchronously lifting the slurry pipe and the concrete guide pipe along with the rising of the poured concrete surface, and keeping the depth of the concrete guide pipe embedded in the concrete surface to be 2-6m until the concrete pouring is finished.

The further technical scheme is that before the concrete is poured in the step S1, after secondary hole cleaning and acceptance check are qualified, the waste in the sedimentation tank and the slurry tank is cleaned, and fresh bentonite slurry is prepared again, wherein each performance index of the slurry meets the standard requirement.

The further technical scheme is that the bottom of one end, positioned in the filling hole, of the mud pipe in the step S2 is connected with a sealing head and a balancing weight.

The still further technical scheme is that the head comprises connecting pipe, fixed plate, connecting rod and bottom plate, and fixed plate and bottom plate parallel arrangement, connecting rod one end are connected with the fixed plate, and the connecting rod other end is connected with the bottom plate, and the connecting rod is fixed with the connecting pipe along the radial evenly distributed of fixed plate, fixed plate top, connecting pipe and mud pipe intercommunication.

The working principle is as follows: the concrete guide pipe is arranged in the pouring hole, the concrete guide pipe is positioned in the center of the pouring hole and is communicated with the concrete hopper, and the concrete hopper is connected with a hoisting device erected above the pouring hole. And after the secondary hole cleaning acceptance is qualified, cleaning up the wastes in the sedimentation tank and the slurry tank, and preparing fresh bentonite slurry again, wherein each performance index of the slurry meets the standard requirement.

After the first tank of concrete is poured, a slurry pump is erected at the central position of the slurry tank and fixed, a slurry pipe is placed down to a proper position along the concrete guide pipe, and the slurry pipe naturally sags under the action of the seal head and the balancing weight.

And (3) starting a slurry pump to pump the slurry into the pouring hole along the slurry pipe, enabling the slurry outside the slurry pipe to move upwards from the bottom of the pouring hole, enabling the slurry inside the slurry pipe to move downwards to form a positive cycle, finally enabling the slurry to flow into a sedimentation tank from a slurry overflow outlet at the top of the pouring hole for sedimentation, and enabling the slurry to overflow from the top to the slurry tank after the liquid level of the sedimentation tank is full to enter the next cycle. And continuously pouring concrete in the process, and synchronously lifting the mud pipe and the concrete guide pipe until the concrete pouring is finished.

Compared with the prior art, the invention has the beneficial effects that:

1. the underwater concrete pouring system and the construction method are used for construction of the basalt stratum, suspended particles in the slurry are difficult to deposit due to positive circulation motion of the slurry in the pouring process, the continuous rising of the poured concrete surface is ensured, the pouring interruption condition is avoided, the pile forming quality is good, the slag inclusion fault phenomenon is avoided, the performance of the slurry in the hole is improved, the bond strength between a steel reinforcement cage and the concrete is improved, and the construction progress and quality are ensured.

2. The slurry pump, the sedimentation tank and the slurry tank used in the underwater concrete pouring system and the construction method are all devices which are put in during drilling, the input of new devices is not required to be added, and the construction cost is low and the effect is good.

3. The underwater concrete pouring system and the construction method are simple, convenient, popular and easy to understand, convenient for constructors to understand and master and convenient to popularize.

Drawings

Fig. 1 is a schematic structural view of an underwater concrete pouring system according to the present invention.

FIG. 2 is a schematic view of the assembly of the slurry pipe, the end enclosure and the counterweight block.

Fig. 3 is a schematic structural diagram of the end socket of the present invention.

Fig. 4 is a front view of the closure of the present invention.

Fig. 5 is a top view of the closure of the present invention.

In the figure: 1-concrete hopper, 2-concrete conduit, 3-mud pipe, 4-mud pump, 5-sedimentation tank, 6-mud tank, 7-pouring hole, 8-end socket, 801-connecting pipe, 802-fixing plate, 803-connecting rod, 804-bottom plate, 9-balancing weight and 10-mud.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 shows: the utility model provides a basalt stratum is concrete filling system under water, including concrete hopper 1, concrete pipe 2, mud pipe 3, slush pump 4, sedimentation tank 5 and mud pit 6, be provided with slush pump 4 in the mud pit 6, 3 one end intercommunications of mud pipe 4 export and mud pipe, 7 bottoms in filling hole are arranged in to the mud pipe 3 other end, concrete hopper 1 sets up in filling hole 7 top, 2 one end of concrete pipe and 1 discharge gate intercommunication of concrete hopper, the 2 other ends of concrete pipe set up in filling hole 7, filling hole 7 top is provided with the mud overflow outlet, the mud overflow outlet communicate with sedimentation tank 5 and mud pit 6 in proper order. As shown in figure 2, the bottom of one end of the mud pipe 3, which is positioned in the pouring hole 7, is connected with a seal head 8 and a balancing weight 9, and the mud pipe 3 is arranged in parallel with the concrete guide pipe 2 and is 6-10m away from the bottom of the concrete guide pipe 2. The lower position of the mud pipe 3 is too low to be easily buried in concrete to cause failure, and the position is too high to play a role in circulating mud in the hole. The end socket 8 and the balancing weight 9 enable the slurry pipe 3 to naturally droop, and the end socket 8 mainly serves to disperse downward pressure of slurry, so that a slurry outlet is prevented from directly impacting poured concrete. The main function of the balancing weight 9 is to prevent the mud pipe 3 made of rubber from floating upwards or swinging left and right under the action of mud pressure in the pipeline when the mud pump 4 works.

The structure of the seal head 8 is shown in fig. 3-5, the seal head 8 is composed of a connecting pipe 801, a fixing plate 802, a connecting rod 803 and a bottom plate 804, the fixing plate 802 and the bottom plate 804 are arranged in parallel, one end of the connecting rod 803 is connected with the fixing plate 802, the other end of the connecting rod 803 is connected with the bottom plate 804, the connecting rod 803 is uniformly distributed along the radial direction of the fixing plate 802, the connecting pipe 801 is fixed at the top of the fixing plate 802, and the connecting pipe 801 is communicated with. The seal head 8 structure mainly aims to ensure that slurry is uniformly discharged from a slurry outlet to the periphery, so that the condition that the slurry 10 directly impacts the poured concrete under the action of pressure to influence the quality of the concrete is avoided, meanwhile, the floating acting force of suspended basalt particles in holes can be accelerated, the particles are more forcefully discharged to orifices of the pouring holes 7, and the resistance of the slurry 10 in the pouring holes 7 is reduced.

For convenience of processing, the fixing plate 802 and the bottom plate 804 are circular steel plates with the same size, the fixing plate 802 is provided with a abdicating hole matched with the connecting pipe 801, the connecting pipe 801 is welded on the fixing plate 802 during processing, and the connecting rod 803 can select a steel bar and is welded on the fixing plate 802 and the bottom plate 804. The fixing plate 802 and the bottom plate 804 are correspondingly provided with positioning holes for positioning the steel bars.

The construction method comprises the following specific steps:

s1: the concrete guide pipe 2 is butted with a discharge hole of the concrete hopper 1 and suspended in the pouring hole 7, the concrete guide pipe 2 is positioned at the center of the pouring hole 7 and communicated with the concrete hopper 1, and the concrete hopper 1 is connected with a hoisting device erected above the pouring hole 7. And after the secondary hole cleaning acceptance is qualified, cleaning the wastes in the sedimentation tank 5 and the mud tank 6, and preparing fresh bentonite mud again, wherein various performance indexes of the mud 10 meet the standard requirements. Pouring first tank concrete;

s2, erecting the mud pump 4 in the mud pool 6, butting one end of the mud pipe 3 with the outlet of the mud pump 4, lowering the other end of the mud pipe to a proper position along the concrete guide pipe 2, and naturally sagging the mud pipe 3 under the action of the seal head 8 and the balancing weight 9. And (3) starting a slurry pump 4, sending the pumped slurry 10 into an injection hole 7 by a slurry pipe 3, enabling the slurry 10 to rise from the bottom of the injection hole 7 and flow into the sedimentation tank 5 from a slurry overflow outlet at the top, enabling the slurry to flow into the slurry tank 6 after the liquid level of the sedimentation tank 5 overflows, circulating, and simultaneously pouring concrete into the concrete hopper 1.

S4: and lifting the mud pipe 3 and the concrete guide pipe 2 along with the rising of the poured concrete surface, and keeping the depth of the concrete guide pipe 2 embedded in the concrete surface to be 2-6m until the concrete pouring is finished.

In the concrete pouring process, the slurry 10 outside the slurry pipe 3 moves upwards from the bottom of the pouring hole 7, and the slurry 10 inside the slurry pipe 3 moves downwards to form positive circulation, so that suspended particles in the pouring hole 7 are difficult to deposit, the continuous rising of the poured concrete surface is ensured, the pouring interruption condition is avoided, the pile forming quality is good, the slag inclusion fault phenomenon is avoided, and the construction progress and quality are ensured.

In the above construction method, the places which are not described are all the category of the conventional underwater concrete construction, the content of the invention is not limited to the above description, and is not limited to the change of the stratum (other igneous rocks, such as granite, etc.) or the change of the mud circulation direction, and any equivalent change of the technical scheme adopted by the person skilled in the art through reading the description of the invention is covered by the claims of the invention.